Does anyone have any pointers for installing a diving rock? I will be installing it this weekend. It appears to be fairly flat on the bottom but I;m sure its not. Do you use a landscape adhesive or non-shirk grout to fill voids and make sure it lays flat? And like they say 'Getting it there is half the fun' This part I have experience with. A half dozen pieces of gas pipe and large pry bar make easy (but not fast) work of moving and positioning it.