I am tiling my bathroom floor and wanted to see how the flange would sit and notch for the screws. The plumber left a 3" diameter riser sticking out of the floor, not yet glued, which comes out of the toilet bend. The flange I bought if placed over the 3" pipe bottoms out on the bend before touching the tile, leaving it about 3/8" off the tile. Is there a flange that could go into the hub on the bend and if so, am I looking for it to bottom out in the hub or is there some height adjustment? I would have posted a pick, but i don't think the site is ipad friendly. hanks for your help.