I dunno if anyone else has bent one of these rare gems. I'm in the process now and there is a lot less space than I'd hope to mount components. So I stripped the matrix off of the case and scanned it through to see where it's safe to drill on the keypad.
For anyone who has this toy, here's the layout. It's almost actual size....
(http://i18.photobucket.com/albums/b125/lukefeelstheforce/littlemaestromatrix.jpg)