I'm new to this site and I just ordered an inground pool kit (18'x36'). I've been reviewing the instructions from the company I purchased the pool from (www.intheswim.com). When installing the metal panels, the instructions state to install 8"x16" patio blocks under the panels where adjacent panels meet to simplify the leveling process (the instructions have you placing wooden shims where necessary under the panels (and above the blocks). I haven't seen this done this way in other installation manuals I've seen online. I'm interested in what others have done to shim where necessary to level these panels. Thanks!