I'm going to be getting a long tank (60" or 72", not sure yet). It's going in my basement, where I can place it along one of two different walls. The floor by one of the walls is level, but by the other wall it isn't. It's got 3/8 to 1/2 inch drop over a 6 foot range. Of course, that's the wall I'd prefer the tank be on. So, simple shims at the end and in the middle? It might look too 'rigged' for my taste. Any one have any ideas on how to do this without it looking like "I" leveled the stand?