Tuna Can Platform - Parametric

Tuna cans are shallow, making it difficult to use a hand can opener while keeping the can steady on the counter so as not to spill. This offset gives you a little platform on which to mount your tuna cans for opening.
This is my first attempt at making a customizer. Because you may need other sizes for particular cans, including larger tuna cans, dog food, etc.

Special thanks to Matt Sauer http://www.thingiverse.com/sauer/about for helping me streamline the code!

UPDATE: I've added the fillets and rounds using minkowski, so the openSCAD customizer version is now a bit more elegant. I've also enlarged the inside hollow, removing more of the excess material. So it should print slightly faster than before.

Freecad version also included for download.