Part 2/Step 2: Slap It on the Sled

Since we found the perfectly sized and shaped rat - her feet are far enough apart to straddle the mouse sled, and her belly hangs all the way to the ground to accommodate most of the mouse's original hardware - all we had to do is cut out the belly to make room for the sled and its electronics. The rat's belly is expendable here, so start your hole small - it's much easier to cut plastic away than it is to put it back. You still need to access the rat's insides, so don't glue anything yet.

No actual rats were harmed in the hacking of this mouse.