Figured this might be helpful as a question in its own right.   Geberit frame is in with 9mm ply over the full face of the frame followed by 12mm Aqua Panel then tiles.     There's a bit of a bow to due my poor tiling.    I have the silicone spray ready to lube the flush & poo pipes up. I have Forever White as the final, "replaceable"   bead where pan meets wall.    What should I stick the pan to the wall with? Sika EBT, CT1 etc. This to gap