I'm going to be tiling a bathroom. I removed the toilet and what I found was a lead bend beat over a flange that's not connected to anything just held with the bent lead all connected to a pvc drain. The problem i have is that the flange is against the concrete slab and i would like the tile to go close to the lead pipe and have the flange sit on top of the tile. Should I just keep it as is and cut the tile to go around the flange and then double up on the wax rings? Also, should I screw the flange to the concrete? Thanks