Hi. I am in the process of setting up my 75 gallon on some older hardwood floors that are uneven. What is the proper way to balance the tank? Right now I have a few pieces of cardboard under the left side and it seems to be balanced perfectly. The problem is, now the brace along the bottom of the stand that runs longways is at that angle caused by the cardboard shims. There is about a centimeter gap (maybe more)between the longways brace and the floor, which obviously gets smaller towards the right side. It seems like once I fill the tank completely, there will be some serious pressure points on that brace and it makes me nervous. Anyone have any suggestions??