Needed to pick up more irrigation supplies - whenever one hires someone for a project in the garden chances are good that either the irrigation or some of the electrics for the irrigation gets dinged - so while at HD I checked out their acrylics supply. 24x48"x .220 clear. BINGO!
RhB turn tables are the decked variety, all the works are hidden under the deck. In addition, AFAIK all of them were/are the Armstrong type except the one at Landquart. That means a simple Lazy Susan, no ring rail etc. all very KISS.