My brother Mark helps me install the grid on the layout. For the grids I used Drywall Shims (found in the drywall section of any hardware store that sells drywall). I ended up cutting the shims in half to make them a little more useable. To anchor in place....the ole tried and true method....hot glue gun. (Word for the wise...apparently HOT GLUE comes out of the end of this gun! Who Knew!)
I think that both Mark and me were pleasantly surprised at how stable the grid gets when you get done.
In the distance the rest of the mountain is in place, ready for plaster cloth (more to come on that).