OO Gauge Couplings (Hornby X8031 style)

thingiverse

Update: A configurable version of this coupling is now part of https://www.thingiverse.com/thing:4632898 Drop in replacement for Hornby's wide style X8031 coupling. It's slightly wider at the base due to the hook's hinge mechanism, but fits fine in old Bachmann trucks. Printed in green while I was developing it, but should look much better in black! Make sure to give the hook hinge mechanism a good clean out - the hook should be free to fall under gravity to ensure a clean coupling. Updated 2nd September, improved hook geometry slightly.