Finally getting back to work on the basement, hung the bathroom ceiling last night and now I can't find directions for the Sterling tub/shower we installed last year. I have never installed these units, only a tile-in type tub. I guess I don't need any drywall behind the enclosure panels?? Straight to the studs? Can't get the installation instructions for this particular unit online, but I looked at some others and there is no drywall mentioned. Here is the unit:Sterling Plumbing: Ensemble™, Tile Bath/Shower: Bathtub Showers: Baths & Showers Thanks for your help!