Built my own yesterday, tweaked today. If I may say so quite nice.
Rather than plastic I went rubber on steel wheel. Rolls better, ultra quiet.
I used parts from a 16 mm motion film projector I had parts stripped.
And I wish to improve my hanger....and I've never seen one close up as how they are clamped and armed.
One piece of my armature is super high end plastics from the projector.
I need some pics of your gear so I can make a total metal one. No machine shop, need an idea.