Answers.Body: <blockquote>
  <p>As mentioned by you already, you cannot insert plates between studs (this used to be a valid technique 20+ years ago, but is no longer considered &quot;legal&quot; by LEGO)</p>
  </blockquote>
  <p>This technique is used in 21309 Saturn V, to mount the flag piece as part of the moon diorama.</p>
  <p>Given this set was released in 2017, I’d say its definitely a modern usage.</p>
  <p><a href="https://i.sstatic.net/HlvKm.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/HlvKm.png" alt="step 325" /></a></p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2021-03-29T10:53:23.917Z
Answers.Text: It's a tile and not a plate... tiles wedged between studs aren't considered illegal, however studded plates are problematic as the lego logo embossed on the studs of the bottom plates protrude against the studs of the wedged plate...
Answers.UserDisplayName: Michael Verschaeve
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Answers.CreationDate: 2021-03-28T09:56:28.037Z
Answers.LastActivityDate: 2021-03-28T15:33:56.550Z
Answers.LastEditDate: 2021-03-28T15:33:56.550Z
Answers.UserDisplayName: Moo
Answers.Body: <p>The 1x1 round piece between 4 studs is used in the part of the Y-wing extra in set 4489. The extra build came across the 4 sets 4488-4491.</p>
  <p><a href="https://i.sstatic.net/fjitU.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fjitU.png" alt="enter image description here" /></a></p>
  <p>Remember getting this as a child and not being able to finish the Y-wing because I couldn't place this piece, definitely feels illegal.</p>
  
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-01-01T21:24:37.843Z
Answers.Text: What you describe here is not related to placing a piece in any sort of ways that would result in damaging any of the pieces in contact or being unable to disassemble, which is usually meant by "illegal" building _technique_.
Answers.UserDisplayName: Alex
Answers.ContentLicense: CC BY-SA 4.0
Answers.CreationDate: 2023-01-02T14:25:46.400Z
Answers.Text: I found this question unanswered when trying to know whether it’s illegal. And OP specifically asks for an example of exactly this, which I provided. Do you know of any other sets where this technique is used?
Answers.UserDisplayName: cornwallluke
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Answers.CreationDate: 2023-01-02T14:53:41.170Z
Answers.Text: My bad. I read your answer incorrectly first time - I assumed you mention an extra piece used to build additional model, which is not part of the base models, but is present as "extra". So I took a liberty on updating your answer to reflect this issue.
Answers.UserDisplayName: Alex
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Answers.LastEditDate: 2023-01-02T14:43:51.370Z
Answers.UserDisplayName: cornwallluke
Body: <p>I am defining illegal as it is in <a href="https://bricks.stackexchange.com/a/7646/17937">this answer</a>, specifically the following</p>
  <blockquote>
  <ul>
  <li>Studs-on-side bricks cannot have their side stud in the hole of a
  technic brick</li>
  <li>Bricks mounted SNOT style onto Ehrling/Headlight bricks cannot sit
  directly above a normal stud (the minimal height of the LEGO
  embossing makes that combination illegal)</li>
  <li>Technic pins have to be fully inserted into technic holes, otherwise they stay in compressed state which causes stress on the element.</li>
  <li>Plates cannot be inserted with their studs into technic bricks, unless it is a 1x1 plate (so only 1 hole is used) and there is no brick attached to the technic brick directly above the inserted plate.</li>
  <li>As mentioned by you already, you cannot insert plates between studs (this used to be a valid technique 20+ years ago, but is no longer considered &quot;legal&quot; by LEGO).</li>
  </ul>
  </blockquote>
  <p>I am also including one other situation:</p>
  <blockquote>
  <p>A round piece between four studs as stated in a comment by <a href="https://bricks.stackexchange.com/users/13859/sandra">Sandra</a>.</p>
  </blockquote>
  <p>When, if ever, have any of these methods been used in an official Lego Build?</p>
  
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-27T06:47:48.290Z
Comments.Text: Have you checked presentation made by LEGO designer Jamie Berard posted in the same answer you are referring to? It has examples.
Comments.UserDisplayName: Alex
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-27T14:24:53.450Z
Comments.Text: Yeah, that file even shows a few (old) times when lego used an illegal technique. Although after each time they admitted that it's illegal.
Comments.UserDisplayName: mindstormsboi
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-27T18:13:38.177Z
Comments.Text: Does this answer your question? [What are some "Illegal" LEGO combinations?](https://bricks.stackexchange.com/questions/7645/what-are-some-illegal-lego-combinations)
Comments.UserDisplayName: Alex
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-27T20:15:15.920Z
Comments.Text: @Alex I literally have an answer to that question linked.
Comments.UserDisplayName: CATboardBETA
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-28T04:50:17.900Z
Comments.Text: Then why didn't you read it? plus the file specifically
Comments.UserDisplayName: mindstormsboi
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-28T14:29:39.423Z
Comments.Text: If the question were about the different types of illegal techniques, it would indeed be a duplicate. But it asks about usages of such techniques in official sets, which is completely different in my eyes, so I vote leave open.
Comments.UserDisplayName: zovits
Comments.ContentLicense: CC BY-SA 4.0
Comments.CreationDate: 2021-03-29T09:42:55.813Z
Comments.Text: See also [When did LEGO decide that it was OK to put a stud into a technic hole](https://bricks.stackexchange.com/q/203/56) - which calls out some specific clarifications from Jamie's presentation, about the techniques being acceptable if they are appropriate to the intended audience.
Comments.UserDisplayName: Zhaph - Ben Duguid
Tags: <building><history>
Title: Are there any cases of Illegal Building in an official lego build?
UserDisplayName: CATboardBETA
ThreadText: # Are there any cases of Illegal Building in an official lego build?
  
  (Asked by: username_0 on 2021-03-27)
  
  I am defining illegal as it is in [this answer](https://bricks.stackexchange.com/a/7646/17937), specifically the following
  
  > * Studs-on-side bricks cannot have their side stud in the hole of a
  >   technic brick
  > * Bricks mounted SNOT style onto Ehrling/Headlight bricks cannot sit
  >   directly above a normal stud (the minimal height of the LEGO
  >   embossing makes that combination illegal)
  > * Technic pins have to be fully inserted into technic holes, otherwise they stay in compressed state which causes stress on the element.
  > * Plates cannot be inserted with their studs into technic bricks, unless it is a 1x1 plate (so only 1 hole is used) and there is no brick attached to the technic brick directly above the inserted plate.
  > * As mentioned by you already, you cannot insert plates between studs (this used to be a valid technique 20+ years ago, but is no longer considered "legal" by LEGO).
  
  I am also including one other situation:
  
  > A round piece between four studs as stated in a comment by [Sandra](https://bricks.stackexchange.com/users/13859/sandra).
  
  When, if ever, have any of these methods been used in an official Lego Build?
  
  **Tags:** building, history
  
  > **Comments:**
  > **username_1**: Have you checked presentation made by LEGO designer Jamie Berard posted in the same answer you are referring to? It has examples.  
  > **username_2**: Yeah, that file even shows a few (old) times when lego used an illegal technique. Although after each time they admitted that it's illegal.  
  > **username_1**: Does this answer your question? [What are some "Illegal" LEGO combinations?](https://bricks.stackexchange.com/questions/7645/what-are-some-illegal-lego-combinations)  
  > **username_0**: @username_1 I literally have an answer to that question linked.  
  > **username_2**: Then why didn't you read it? plus the file specifically  
  > **username_3**: If the question were about the different types of illegal techniques, it would indeed be a duplicate. But it asks about usages of such techniques in official sets, which is completely different in my eyes, so I vote leave open.  
  > **username_4**: See also [When did LEGO decide that it was OK to put a stud into a technic hole](https://bricks.stackexchange.com/q/203/56) - which calls out some specific clarifications from Jamie's presentation, about the techniques being acceptable if they are appropriate to the intended audience.  
  
  ---
  
  ## 2 answers
  
  ### Answer by username_5 on 2021-03-28. Score: 3 | Accepted answer
  
  > As mentioned by you already, you cannot insert plates between studs (this used to be a valid technique 20+ years ago, but is no longer considered "legal" by LEGO)
  
  This technique is used in 21309 Saturn V, to mount the flag piece as part of the moon diorama.
  
  Given this set was released in 2017, I’d say its definitely a modern usage.
  
  [![step 325](https://i.sstatic.net/HlvKm.png)](https://i.sstatic.net/HlvKm.png)
  
  > **Comments:**
  > **username_6**: It's a tile and not a plate... tiles wedged between studs aren't considered illegal, however studded plates are problematic as the lego logo embossed on the studs of the bottom plates protrude against the studs of the wedged plate...  
  
  ---
  
  ### Answer by username_7 on 2023-01-01. Score: 1
  
  The 1x1 round piece between 4 studs is used in the part of the Y-wing extra in set 4489. The extra build came across the 4 sets 4488-4491.
  
  [![enter image description here](https://i.sstatic.net/fjitU.png)](https://i.sstatic.net/fjitU.png)
  
  Remember getting this as a child and not being able to finish the Y-wing because I couldn't place this piece, definitely feels illegal.
  
  > **Comments:**
  > **username_1**: What you describe here is not related to placing a piece in any sort of ways that would result in damaging any of the pieces in contact or being unable to disassemble, which is usually meant by "illegal" building _technique_.  
  > **username_7**: I found this question unanswered when trying to know whether it’s illegal. And OP specifically asks for an example of exactly this, which I provided. Do you know of any other sets where this technique is used?  
  > **username_1**: My bad. I read your answer incorrectly first time - I assumed you mention an extra piece used to build additional model, which is not part of the base models, but is present as "extra". So I took a liberty on updating your answer to reflect this issue.  
  
  ---
  
  