Hakko T12

This is a different approach to housing the Chinese T12 control electronics.
This model is intended to sit on top of once of the many power tool battery socket.
It fits exactly on top of the M18 adapter I remixed.

There are two versions. One with a 20mm round switch hole and one with a 14mm* 8.5mm rectangular switch hole.

The V5 revisions increase the dimensions of the corner pillars from 6mm to 9mm to accomodate more variations of screws and placements and increase the rectangular switch hole to 16mm * 19mm.