I'm installing a preformed shower tray on a concrete slab. The drain pipe coming up fits in the hole of the shower base, but it's not centered. I can push the pipe to the center, but then it's not completely plumb. I was planning to use a brass no caulk shower drain. My question is: if I install the no caulk drain as is, will the few degrees that my pipe would be angled at cause any problems? The tray hasn't been installed yet, but I can move it back any further because of the walls.