I found the tolerance between the two pieces of the original hook way too tight, and even the remix by Rahmi (.3 mm) still didn't slide freely. Not sure if it was the rougher surface of the wood filament I'm using or what, but I needed a looser fit, so here it is. If yours prints the same as mine, it should still be tight but still move freely with a light tug. Hope it works for you too!
Printed with MK4, .4mm nozzle, .2mm layers, hatchbox wood PLA
The author remixed this model.
The T part of the joint is .5mm looser than the original.