Reminding you that I've done the mod with
Cherry-style keys replacing the Chiclets on one of my Kinesis Contours.
The PCB mounting was harder than cutting the case aesthetically, at least as far as hours spent are counted. The screws for the PCB enter a channel instead of a cylinder. This means the screws are essentially in contact with only two points, and can pivot if you're not careful. I'll post some pics in my thread next time I open the case.
So far I've mounted only the 12 fkeys, but ESC is the one I need more often. I've been tempted to put a red ESC smack dab in the middle, but been holding back with the ESC implementation until I'm not impatient.
EDIT:
This pic shows the oval 'holes' or channels on each end of the cutout. These serve to anchor the screws PLUS hold the PCB at the proper angle. They are hard to work with. The top end is too shallow to hold a screw properly.
The following image shows my PCB mounting with motherboard standoffs. The nylon shafts at the top of the pic were too long and the nylon screws stripped too easily for them to be a permanent solution.