Has anyone had any experience with Aqueon custom drilling a tank for them? Were the holes drilled where you specified? The thing that kinda scares me is that their custom drilled tank order form says "All dimensional tolerances are ± 1/2". That's HUGE! I'm used to dealing with ± .015" at work. My overflow box has two bulkheads so the holes have to be the correct distance apart and the correct distance from the top of the tank. A half inch off isn't acceptable.