My husband ran into a problem with the installing of the tub. We have this flange kit - had no instructions - my husband thought he had it figured out. WE had completely tore the whole bathroom down. He put up the drywall - waited weeks to get the drywall mudded and finised then put the tub in and cemented in and went to put up flange to put on surround and found out the flange was suppose to have gone on before drywall and drywall comes down over flange. Cannot change now but can we put flange on edge of tub with silicone just for a little more protectant and install the surround anyway?