Close.  By the way there is a bk _scat command (sccs cat, not poop) that dumps the ascii file format so you can try this and see.<p>The delete needs to be an envelope around the insert so you get<p><pre><code>  ^AD 3
  ^AI 1
  this is the first line in the first version.
  ^AE 1
  ^AE 3
  ^AI 2
  this is the line that was added in the second version
  ^AE 2
</code></pre>
That whole weave thing is really cool.  The only person outside of BK land that got it was Braam Cohen in Codeville, I think he had a weave.