I picked up an old O'dell 125 tank on Craigslist for a couple pennies and resealed it. It does not have a brace in the center of the tank. Is that necessary? I have read that if it wasn't designed for one it is not needed, however I would like some more input. I plan on leak testing it tomorrow and measuring deflection while filling. It has 1/2" glass, so what would be acceptable for deflection? The only replacement trim I have found with a brace would be getting 2 for a different tank, cutting one end off of each and putting them together. Thanks in advance.