Bernie Hunt wrote:
I'm adding this post for the archives. I ended solving two problems with one
solution. I always hated taping butt joints and I didn't have the joints
landing on studs. I found these premade backer boards that made taping the
butt joints simple!

http://www.butthanger.com/rock_splicer.html

The butt joints came out tapered like the factory edges and taping was
simple, no crowned joints!

I actually had to cut back a couple of the panels to make sure they didn't
land on studs, hahahaha.

I've never used the "store-bought" version - I just use scraps of
plywood. How much did they cost?

R