This is a project of my own .. I have had them printed but not assembled yet. If you want them printed then so do so at your own risk.
I am creating this for an Ore Bin that I will be scratch building at some point. Once I get further along I will link to my SBS.
These are printed in WSF - White Strong and Flexible, a sintered nylon. IMO .. looks like heavy cast iron in O scale .. or "close nuff"
These go with my Rack and Pinion Ore Bin Gates
I am going to use them for my Ore Bin
I have opened a discussion in my forum on the ore bin gates etc. - Ore Chute/Gate
I also have a detailed SBS on my blog - http://deepriverrailroad.com/structures/commercial/timber-ore-bin/ore-chutes/