ORIGINAL: ballbearingman
Have a friend who tried the Magnum 120 4s and it was not enough humph in the verticles. I am currently flying my Excelleron with a YS 120 and no problems what so ever. If you are just beginning pattern the Magnum will do ok, say in the Sportsman class. But as you advance into more demanding manuvers you will need more power.
Good Luck,
BBM [8D]
Thanks Ballbearingman!