G-Scale Super Chief coupling

Coupling to go with F7, Super Chief Locomotives and carriages

UNTRIED at this stage, but all bases have been slightly modified to catch the end of the clips.

F7 parts found at:
Body: https://www.thingiverse.com/thing:5331629
Chassis: https://www.thingiverse.com/thing:5331632
Roof: https://www.thingiverse.com/thing:5331634
Drive mechanism: https://www.thingiverse.com/thing:5331636
F7-B Unit: https://www.thingiverse.com/thing:5331641

Carriages found at:
Dining Car: https://www.thingiverse.com/thing:5334363
Observation Car: https://www.thingiverse.com/thing:5333532
Passenger Car: https://www.thingiverse.com/thing:5334371
Baggage Car: https://www.thingiverse.com/thing:5334596
RPO Coach: https://www.thingiverse.com/thing:5334602
Sleeper 10 6: https://www.thingiverse.com/thing:5334604
Duplex Sleeper: https://www.thingiverse.com/thing:5334607
Mail Car: https://www.thingiverse.com/thing:5334635
Part Dome: https://www.thingiverse.com/thing:5334796
Superdome: https://www