The overall fit is cut perfectly. It's just puffy enough that you have to compress the foam a little bit in order to screw the case down. This ensures that the foam's dampening power is maximized. The thing I appreciate the most is that this foam kit makes the keyboard feel unbelievably solid with zero feeling of any kind of looseness. It is now a very firm feeling keyboard. If you have a V1 keyboard and want to dampen the sound you would be doing yourself the biggest favor by installing this kit. Absolutely positively highly recommended. I would also recommend putting a small piece of electrical tape between the four metal plates that attach to the removable feet and the bottom case plate to keep the two pieces of metal from rattling against each other.
Add this foam to my CTRL V1 with Cherry Blues. Made a noticeable difference to the pitch of the switches, not as “scratchy” or sharp sounding now. Easy assembly.
This really helped to dampen and remove some of the sharper overtones from my older Drop CTRL v1 that didn't include any foam. It would have been nice if it had also included some foam for some of the larger keys that echo quite a bit such as the space bar and shift keys. It took about an hour to fully disassemble, clean, and add the poron form.