RTM X End Clamp, for the Ronthomp Mendel

This is a simplification. I added the Z stop bolt mount to the X end clamp, eliminating a printed part, some hardware and a source of failure. My clip on Z stop is easy to move accidentally.
The bolt is a 6-32 x 2" and is tightened against the trapped nut. (4mm works, too.) The Z home is easily and accurately adjusted by moving the thumb nut. One turn of the 6-32 screw is .03125"
The thumb nut is self threading when you screw it on, just keep it straight.
The clamp still uses the M3 nuts in 4