I'm installing a new toilet on a basement floor. I lined up the
flange slots with the bowl holes and traced around the perimeter of
the toilet. When dry-fitted It slightly rocks on the concrete floor.
I can remove small amounts of the concrete with a Dremmel tool. Is
there an easier way than trial-and-error to determine the high points?
How is this usually done? I'm guessing that this rocking has to be
eliminated before I can proceed with the install? TIA