By cap I did mean capacitor, sorry for being lazy and not typing it out. With a fan and bec you should not need it, with a bec and cap you should not need the fan. I ran bec, fan, and cap, but mine was in a 10lb revo conversion on 4s lipo.

Novak makes a cap that works great, or you can get one of the same spec as the novak for less from digikey.com