I'm not sure how many of you guys might be interested in this one, but anyways...
I got a Kinesis Advantage almost a year ago, and love it over all, except for one little detail that always bugged me. Due to an unusual usage environment, I'm always using keyboards on my lap, and the Kinesis has an extremely curved bottom that rolls around on a lap, which is significantly less than ideal.
So I brainstormed up a way to make the bottom flat, and even padded, without actually modifying the keyboard itself. =D I came up with the idea to attach a flat bottom piece to the keyboard by way of pegs with magnets on the ends that stick to the screws that hold the keyboard together.
I finally set out and put it together today, using plain plywood, dowel, rare earth magnets, superglue, polyurethane foam, faux leather, and staples.
The result:
This is the side of the base that attaches to the keyboard, showing the magnet tipped pegs:
This is the plush side that rests on my lap:
Here's the base attached to the board:
And here's a shot from the top/side:
It's worked out quite nicely i think, though I'm having second thoughts about the foam and faux leather padding. I'll give that a while, and possibly end up ripping it off and replacing it with a piece of giant mousepad, with the fabric side out.
BTW, the spiral cord on it is also a mod related to lap use, the regular cord bothered me either hanging down and getting tangled, or being too short if I bundled up slack, so I replaced it with telephone handset cord.