Our starting point was hanging off the bottom of the deck. The 1/16th tolerance on locating the inserts is problematic because of cumulative tolerances. There were 2 bolts/hanger and 3 hangers per panel. In real life it means each insert can be correct (within 1/16th) but the system won't work. There will be fit problems - either trouble getting a panel in at all, or lacking enough adjustment so it can fit nicely in line with its neighbor.