Now have built up first 2 samples of my 3D printed working turntable
Both are 16.5mm gauge, one on left is 48mm diameter , other one is 84mm diameter. Different stone surfaces are available, match my inset track system.
Operating is done by moving lever from side to side. Turntable only ever needs to move 90deg so one track can be connected up live to allow locos to cross it.
Just waiting for some slightly modified versions, including a 9mm gauge version o0f the 48mm diameter and a 24mm diameter.
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges. http://www.rue-d-etropal.com