For new tanks, cutting the center brace voids the warranty, but I think the warranty is only for 90 days or so. I've cut mine on 3' 65g & it is much brighter now that the plastic brace does not block out most of the MH light. I have not noticed any bowing. I have a 6' 110g that came without any bracing & it's doing fine all these years. Knock on wood.
Anthony
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