I see guys asking questions on here quite often, and see that most with the FF boxes really like them...

Well, my power box leaking, and I was thinking about a Firm Feel box, but I've got a 13" wheel, and I'm not really sure what I want to do.

I may just end up with a rebuilt one, or see how hard these are to rebuild myself...

BUT, my main question for FF owners, what diameter of wheel are you running?