GTB fan necessary?

[DomRC]

It would appear from reading around on here that the fan on top of the 2nd hand GTB esc I bought the other day could affect my choice of 2wd buggy if I want it to fit nicely...

I wonder if people think it'll be necessary to even have the fan with a 7.5t motor? Some of the blades are missing anyway...

If it is necessary, am i better of buying an aftermarket fan and mounting it next to the GTB if it doesn't fit?

I know this presents a problem in a Losi... what about B4, X-6, RB5?

Cheers