Used Unilock Brussels Block Fullnose on the beam of a gunite pool (Pool is 40yrs old). For some reason the beam is different thicknesses all around. The pool is "L' shaped with lots of straight edges, some of these edges have the coping over hanging toward the outside of the pool which will cause the ground to pop these pieces off most likely. Have the option of cutting the stone off, but will not match around the pool. Have also heard to support the rear edge with styrofoam glued to the pool. Will be adding an expansion joint between the coping and interlock aswell. Any recommended solutions?