Hi. I have two questions pertaining to a shower remodel. One, I will have 4 or 5 shower heads producing a total 10-12.5 GPM. If everything is pitched and vented properly will a 2 inch drain be sufficient to get rid of the water? Second, does anyone have a suggestion as to how far apart body sprays can be to be effective? I'm thinking of putting in a 60x32" shower pan and putting the sprays on the 60" opposing walls. Thanks