40bit is looking really good.
• I agree that R2 "Back" is unnecessary, you can just use the R2 "Delete" from the base kit… unless people are digging the aesthetic of it saying "Back". I personally like it, but I'd much rather see the key requested in the next bullet if it makes a difference.
• An additional 2u Space would be the one key I would really hope to see added, it's gaining in popularity. There are a handful of boards that use a double 2u Space and would save from having to buy the Spacebar kit for one key (like I had to for the GMK Calm Depths Assembly). Planck rev6 & EOTW, Preonic rev3, Boardwalk Ortho, Eco, Iris, Levinson, Nyquist, and a handful of other split boards.
• A R4 1.5u Shift would be great, if possible. UT47/Gnap! and others use this. There are no R4 1.5u keys in any of the kits unfortunately.
Definitely in on this. Thx.