I seen a turn table in a 1970's model railroad magizine that looked like this,,,,I'm not sure how authentic it was, but I always thought it looked cool,in a rustic mtn. older times setting,,,the magazine model was HO, this one is for On30,,,48'scale feet,,,just long enough to turn the Mogal and the Consolidation around,,,anything bigger is out of luck,,,,fortunatly the Consolidation is this empires biggest and longest motive power,( the turntable is 12" diameter,1/2" thick partcle board,,built with a deck,,,with the heavy timber overhead supports,,hardware accents will be added later),the table will be manual with just the two approaches,,its at the end of the peninsula section I'm working on,,,,Randy May