Thanks, I was really hoping to keep it all internal but with the swap to the Pi 4 it would have lost quite a few mount points to the battery and it was a little too thick in places so would have required more work either thinning the shell or move it up and possibly lose most of the top screw points. Eventually I may try to 3d print a new back shell to actually make it all internal and thinner than it currently is.
As I said, unfortunately on 2.4Ghz it won't stay connected properly, most likely due to the number of networks near me which is what required the swap to a larger Pi since as far as I'm aware none of the more compact models support 5Ghz wifi so there wasn't a great way to move forward using a Pi 0.
I swapped the cable out for a USB-C port a while before this so even with this mod I can still plug it in to a PC to use it wired if I want. I decided to go with the Speed Silvers from my K100 that I had removed and swapped out the springs for heavier springs. I have one heavier switch for the spacebar and used some clicky switches for the two lock keys on the board. In addition, since I had it all apart anyway, I sanded and painted the top plate white to help brighten up the board and the lighting. Overall though it works great.
I hope Corsair is planning more wireless RGB keyboards of different sizes.