5s flightmax in a e-revo brushless

i´m thinking about to buy an e-revo brushless.

but i like to use 5s zippy flightmax batteries because i got some of these.

is it possible to cut the top of battery cases of a e-revo for using this batteries?

is somebody here who have done this and have any informations or pics?

or will a revo 3.3 conversion the better way for me?

thx