>

Really interested in how it sounds, will you be posting a soundtest?
For anyone interested in these components... YMD-75%: 

The YMD 75% kit arrived extremely fast for China-US shipping, but I don't really recommend the board due to the following:
PCB seems designed to accommodate ISO and other layouts (there are extra holes drilled for stabs where ANSI doesn't need them). This causes some odd fitment in a couple places.
The polycarbonate plate doesn't fit perfectly with the stabs in some places which caused some sticking and tilting of the Enter key and spacebar. I was able to mostly fix this with trial and error, but YMMV.
The walnut wood case is very light. With no option for a weight (aside from going the DIY route), the board doesn't feel very premium. Also, it obviously sounds hollower than my aluminum keebs, despite using a fair amount of foam. 
Right control key switch doesn't have all the necessary holes, so it wiggles a lot and won't sit in quite the right place (see image). 
All that said, it sounds pretty good. Nice deep thocks and the stabs don't rattle (I only lubed stabs, skipped the bandaid mod this time). 

Boba U4Tx:

Lovely switches. I was a fan of the regular U4T and these feel nearly the same, with a much more muted upstroke. I didn't lube them this time, which I think helps preserve the extremely binary tactile bump. They feel only slightly scratchier than my lubed U4T switches.
They feel harder to press than my U4T, but this could be because they are unlubed or because my U4Ts are very broken in. 
The U4Tx also has much less stem wobble than the U4T thanks to the box design. There is still some (I'm using these SA profile keycaps, so that doesn't help), but it's much less than the U4T. 
The sound is really quite nice. In this build, there is a thocky bottom out and a very muted upstroke. When typing, the upstroke is hardly noticeable. >

I would imagine that you made a very thocky board. Wood sounds very resonant. 
I saw that you didn't lube you Bobas. I tried this but I ended up lubing my Boba u4ts because the 68 gram spring and massive tactile bump gave me finger fatigue. It doesn't affect the sound too much but they are smoother. 
Overall, I really like your whole setup. >

Thanks! I agree about the finger fatigue. My U4T switches on my other board are lubed and definitely easier to press. Time will tell if I can get used to these unlubed ones. >

Nice colors, what keycaps are those btw? >

These are Maxkey SA profile in White & Green. They are more blue than green IMO, but they look nice either way. I actually don't really like the shape of SA profile, but the sound is very nice. >

For anyone interested in these components... YMD-75%: 

The YMD 75% kit arrived extremely fast for China-US shipping, but I don't really recommend the board due to the following:
PCB seems designed to accommodate ISO and other layouts (there are extra holes drilled for stabs where ANSI doesn't need them). This causes some odd fitment in a couple places.
The polycarbonate plate doesn't fit perfectly with the stabs in some places which caused some sticking and tilting of the Enter key and spacebar. I was able to mostly fix this with trial and error, but YMMV.
The walnut wood case is very light. With no option for a weight (aside from going the DIY route), the board doesn't feel very premium. Also, it obviously sounds hollower than my aluminum keebs, despite using a fair amount of foam. 
Right control key switch doesn't have all the necessary holes, so it wiggles a lot and won't sit in quite the right place (see image). 
All that said, it sounds pretty good. Nice deep thocks and the stabs don't rattle (I only lubed stabs, skipped the bandaid mod this time). 

Boba U4Tx:

Lovely switches. I was a fan of the regular U4T and these feel nearly the same, with a much more muted upstroke. I didn't lube them this time, which I think helps preserve the extremely binary tactile bump. They feel only slightly scratchier than my lubed U4T switches.
They feel harder to press than my U4T, but this could be because they are unlubed or because my U4Ts are very broken in. 
The U4Tx also has much less stem wobble than the U4T thanks to the box design. There is still some (I'm using these SA profile keycaps, so that doesn't help), but it's much less than the U4T. 
The sound is really quite nice. In this build, there is a thocky bottom out and a very muted upstroke. When typing, the upstroke is hardly noticeable.