Yes, the panels are all intentionally removable and intended to be replaced.
With each bracket, that adjusts vertically...they also adjust side to side.
Also there are spring loaded clips made of stainless that put a forward
pressure against the stone that allow us to adjust for plane and plumb.
On the under side of each bracket is a small L shape piece of metal the
stone rests on. We are using 1/16" horseshoe granite shims to keep the
joint consistent as we adjust the brackets. Its not thinset and mortar, but
any stone setter would understand and take to this within a short time. Today
was my first time working with this system and I actually got quite a few
pieces up.

I'll try to get some better close ups of the brackets and framing
and report back either thurs. night or friday.