I'm in the process of installing a new 24" MR Turntable into my layout. The underneath mounting tabs (four) are 1.5" from the top of the pit wall. Unfortunately, for different reasons, I had to use 3/4" plywood and 1" foamboard to construct the layout - for a total layout thickness of 1.75".
That means if I just installed the turntable as is, the pit wall would be a 1/4" lower than the surrounding layout, which is unacceptable. I would want the pit wall height to be flush with the layout surface.
For a variety of reasons, it's not really feasible to cut the foam surrounding the TT lower by a 1/4" to make it flush with the pit wall. My thought was to first insert the TT into the layout from below so that the mounting tabs are flush with the bottom of the plywood and then trace out where the 4 mounting tabs are located; remove the TT; and then use a router to rout out where the tabs would go by a 1/4" deep, so that the tabs would be recessed into the plywood by a 1/4" and the top of the pit wall would then be flush with the layout surface.
The tabs stick out about 2" from the edge of the TT, so I could also rout out a full 1/4" deep 2" wide circle, but I think that's overkill.
I just want to be sure I've thought this out or if there might be a different/better/easier way to make the pit wall flush with the layout surface.
All thoughts appreciated.