RE: Magnum vs. Viper
Your choice do you want a hand launched belly lander or a something with wheels?
That is the decision that has to be made FIRST.
THe Magnum does not slow much in the turns far less than you think,
Mine has a Jett Sport 50 and it rocks!!!
A Whiplash or Diamond dust will slow some when you pull the delta wing into a turn all that wing area is now and airbrake. I have several Whiplashes Jett Fire 50 & Sport 50.
Magnum UK .50 combo with tuned Pipe will do 180+ on the right prop and tuning.
My buddy HAD one till the Rx failed.
bob revver brother # 105