I purchased a 1 piece AquaGlass tub/shower at Lowe's and installed it
myself with help from a plumber neighbor. We installed the drain and
found that it was leaking. An inspection revealed that the area where
the drain mounts to the tub is rough on one side and not flat like the
other. As a result, the gasket will not seal.

I called AquaGlass, and they said that they can tell us how to sand it
to fix it or they can send someone, which may take 10 days or more.
They acted like this is not an uncommon thing to have to do. Anyone
encountered this?

All comments and advice appreciated.

J F Moore