I tiled my bathroom including behind the toilet. The wall used to have just 1/2" drywall and I removed that for tiling. After installing shims, hardie board, mastic, and tile, the wall is closer to the toilet flange by 1". I dry fitted the toilet and I am not going to be able to use the slots/outlets in the flange...they don't line up. I suppose the original toilet had little to no "wiggle" room the wall to the outlets in the flange. The only thing I can think of is drilling in fasterners down an inche away from the wall....but the outlet hole in the toilet and flange hole won't line up. However, the toilet hole is a bit smaller than the flange hole. Is this an acceptable solution or is there a better one?