| rookie, you always have the coolest problems..lol
You'll find that you had a hairline fracture in the brace that you never new existed. Over time with normal vibration or external temp swings it possibly got worst, not to mention salt crystal structures building up within the cavity. Couple that with increased mass due to normal salt creep & you might have your answer.
As for worry factor, i wouldn't be. Tanks unless designed by dodgy bros, have decent tolerances. Id would do as the other suggested though, clean it, & prep it for a new cut piece the exacting length as the old.
Pay attention to the ends, being the back & front display sides, you want to get a decent amount of silicon to bond to these as ancor points. Judging by the pics though, it looks like it sits ontop of the outer rail anyways.
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 V-series Productions | 
