Arcade at home

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Im loving third strike online at the moment, insomuch that i brought myself a Hori Real Arcade Prostick. i'm still having a few problems though; it's with double QCF motions. I have been wondering if it is worth changing the guard from square to an octagonal? Or am i better off leaving it as it is? Or is there any other stick mods that would be worth having a look at. Any help, advice, insight or ideas are going to be welcome and well recieved.