So I recently built a stand and now have two problems. one the top is not perfect with 1/32 of variation throughout the top. second and most important now is bowing of the back header. I built the aquarium in the cold garage and now that it is inside the back header bowed. now i thinking build a new stand or take another 2x6 and bolt it to the old to get rid of the bow. the bowing did cause the header to have less contact with the vertical supports. anybody has a similar experience. if so how did you fix and what was the outcome.