Before train BCHW can leave Pocatello it's motive power must be turned. Fortunately the temporarly Pocatello staging area has a new hand-operated turntable. It's not much in the way of prototypical appearance but it's big enough to turn a pair of SD7's around.

The turntable is a circular piece of 3/4 plywood I cut out with my bandsaw. The turntable track is aligned with the grain (since there is a bit of warpage in the plywood and along the grain is the least warpage). To control warpage further a pair of plywood "ribs" are glued parallel to the track.

Wiring is simple, a twisted pair of stranded 16ga wires are threaded through the 1/4" brass tube the turntable pivots around. The arrows on the table show which direction to go for a 180 degree turnaround. Don't want to keep turning the same direction as the wires would get over twisted. The toggle switch is set to which end is next to the lead tracks to get the polarity right. A DCC autoreverse unit could be used here to make polarity selection automatic.
The base plate is a piece of 3/4" birch plywood. The Birch plywood is much less prone to warpage. I would have made the table itself from birch plywood but the roadbed under the lead tracks is regular 3/4" fir plywood which is less thick than birch plywood (3/4" fir plywood isn't quite 3/4" thick - but the birch plywood is!)