I ended up getting my top plywood flat with no gaps so it all worked out great. I would contact steve. He will probably send you a new stand if it's defective.so did you figure it out because i have a sca 150 pnp with a stand that came with the tank and its not touching on front right and front left using 1/4 yoga pad my floor is a little uneven though so idk might need to figure that out