I put the roundtable files that I finished last spring (see above) up on my thingiverse.com account yesterday here.....
https://www.thingiverse.com/sumner/designsAlso the build detail that shows all the parts and how they go together is here .....
http://1fatgmc.com/RailRoad/Turntable/Turntable-Index.htmlLinks to the print files are on those pages also.
I designed some of the hand rails for the deck and the arch platform last summer but not all so they aren't up and I still hope to design ladders to get down into the pit and probably up the arch as well. I do have print files for ladders on my account/site also that could be used.
I'm undecided if I'll put the Arduino sketches up or not as there hasn't been any interest in the electrical part of the project. A number of the print files have been collected though in the last 24 hours. One could come up with a number of ways to rotate the table if they didn't want to follow my example.
Above is a video overview of the turntable in operation.
Sumner