The default 2d toilet has double temp dims.
From what I can tell, it has temp dims to the center lines, and to the sides.
I went in and changed the masking area to lines, instead of invisible, and deleted all of the symbolic lines that overlap the masking area (why have the same thing twice?).

I still get a temp to the CL and a temp to the side. Superimposed. I know Revit remembers the temp dimension changes you make, but I'd like this to come in one way only.

What is the answer here?

Forget the Revit OOTB family and make my own?
Put a ref line for the side walls in there and create a wall spacing parameter?

I'd like to have an idea of how to control the temp dims.

tx