thanks for all the responses guys. i will just ride it out for now and just keep and eye on it.
next time I do a deep cleaning tear down i will lay a couple pieces of plywood down, I have a big piece of 3/4 plywood just taking up space in the garage . I had to level the stand out with a piece of tile on the back to legs since the floor in this room is way off from level. checked it to make sure it was level with a bubble leveler so there shouldn't any twisting going on the stand.
thanks for the compliments on the tanks. I'm very happy with this stacked set up, kinda thinking of getting another set of stacked 40g breeders, or maybe stack 75g since I already have the tanks . thanks again for the advice