Hello. I am trying to stall an overflow drain in a new tub and when I dry fit the wedge seal against the overflow drain the seal is not even. If I try and get an even seal, the pipe is no longer vertical. I contacted the tub vendor, but they have no technical knowledge of their product, they just recommended a different drain which will not work for me. Does anyone have experience with this issue, I was thinking of using a flexible pipe, or is there a thicker wedge seal? Any help would be greatly appreciated.