Smoothieboard Tslot mount

Not perfect...I was a bit off on the board hole alignment...I expect to edit it more later and I have included the sketchup file if anyone would like to mod it.

Should allow mounting of a smoothieboard on any tslot frame that has a 90deg corner (20mm spacing, i.e. 2020, 2040, 2060)

This is a 4 axis beta board. New boards should be the same...if not I will mod it.