My shower drain has a 4" cover plate attached with two 10-24 ss x 3/8"
machine screws. It is a PVC type drain but has a mild steel insert for
the two machine screws. The inserts have completely rusted away and I
have removed the screws. Any way to repair without removing the tile
and floor and replacing the entire drain? Could I rotate 90deg and
drill two holes in the pvc and reinstall the screws into the pvc? Or
drill deeper into the pvc and install 2 new 3/4" long screws in the
existing position? Any ideas appreciated, Thanks