Thanks for the forum.
I've placed Durock on the shower surround. The framing is a bit off so where the cement board meets the drywall, the cement board is not flush. Rather its raised about 1/8 to a 1/4". This is only about three out of five feet. It is flush in the corners.
A couple options are
to use mud to smooth it out.
Use a belt sander to grind down the high spots of cement board.
Or cut three more inches of drywall off to the next framing stud, reconfigure the cement board and secured to the stud and make the seam flush.
Thanks for your feedback