Cannot adjust shower doors to align correctly because shower walls aren't plumb... the shower bypass doors/rails etc are level and plumb but they leave gaps because the wall of the shower isn't plumb... any way to correct that enough to align the doors? Out of plumb appx 1/8 " on both sides.

Also forgot to add... this is a shower/tub insert... any way to adjust/shim the walls at the top of the shower walls to bring them into plumb so the bypass doors line up?

Usually, doors can be adjusted to compensate for uneven walls. Also, you can put shims under vertical rails that attach to the wall. Caulk the gap.

Remove door from upper track. At top of door u will see a tab with wheel on it. The tab will have either 3 or 4 holes in it. Relocate one wheel to another hole. This will change the hang of door.

If u want to bring the top of door into wall track, move wheel closest to wall up one or two holes.

Good luck

Chuck