Running 4S on a Mamba Max - Neccessary Mods

[rawfuls]

I will be running a 36-50-3300kV 5mm shaft v2 Medusa, if the deal goes through! on my Mamba Max, going to have to pick up a fan as well, any cheap ones?

I know I need a External BEC, and I have the 10amp, castle BEC, and I will just remove the red pin, and tape it, so if I need to use it on something else, it's always there.

Will I need a cap? I read a thread, where someone (I think BrianG) recommended a 2700uF Cap I believe, and this was the link:
http://search.digikey.com/scripts/Dk...name=P10286-ND

Anything else that's recomended?

Let me know guys!
I'll be using my 2 2s 7.4V 5000mAh Turnigy's and my 2 2S 7.4V 5000mAh TrueRC Hardcased on this.