I agree w/r1Morris,

A brushless w/lithiums would work, however you are spending alot of $$$ to make a heavy plane fly adequately.

I have an Ace Ultimate w/an OS .25..........outstading filer!!!

I would save my brushless gear for already light airframes to take full advantage of their purpose.

I personally thing the Ace planes are siuted for gas only. The lightenting efforts usually equal the time spent biulding the entire kit.

Just my 2 pennies.