Tapping Into Kit Transmission Casing

[Madison]

I don't have the physical pieces in front of me, so perhaps someone with firsthand knowledge can help me out here.

The transmission provided in last year's kit were encased in a housing made of two pieces, held together by 1/4-20 UNC bolts at the four corners. The assembly instructions spec. 1/2" length on those bolts and, similarly, the drawings show that they're tapped to 12.7 mm.

I want to tap the other end of those four holes and bolt the transmission to a plate using four separate 1/4-20 screws so that, if I remove the transmission from the plate, it'll stay assembled.

This seems perfectly plausible, but I am working on an abbreviated timetable and can't wait until I see the transmissions again to be sure. Can someone verify that I'm not crazy and this is possible?

Thanks.