Thanks - I kind of suspected thats what we should do. The pool came with some shorter straps to be used with the buttress brace model - we were instructed to discard them but we save everything. We will look at drilling new holes but if that won't work, those extra straps will be used for cutting to make an insert/extension. It ends up being a total of about 1.5" short between the sides, we leveled, measured, more leveling, measuring - still short. This should solve the problem nicely.

thanks Dennis