Hi. Been scratching my head for a while trying to figure this out: I soldered the adapter that came with the spout onto the 1/2 copper pipe. The end with the o-ring in front, and the threaded end 1 1/4" away from the shower wall. EXACTLY like specified in the instructions.... (actual allowance is 1/2" to 1 1/4" max) Now just screw in the spout by hand until flush with shower wall. Problem is that it won't screw. I get a quarter turn on it and it stops there. Trying to go further either damages the plastic treads inside the spout or breaks the assembly all together! I know: I tried. Even called Delta and the tech told me it shouldn't be a problem, and shipped me 2 new spouts. But unfortunately, I still got the same problem with these too! Somebody had the same problem? Please help!!!!!!