I recently got a 55g tank off craigslist and the stand that came with it had some places that werent very sturdy(cheap plyboard type stand) i found a great deal on a metal one to use until i save up the money to get the one I really want. How do these metal stands hold up? it kinda worries me that there will be no support in the middle of the stand ie. like an extra brace...is this just a paranoia thought?? anyone elses thoughts about this??