I have returned to control line after about 50 years and am relearning the stunt pattern with an ARF Flite Streak on 60 ' lines. First I used an OS FP 25 but it was overpowered. Now I am using a FP 20 and it has plenty of power for everything I can do including verticals and overheads. It is stock with a muffler and gives very consistant runs. I am going to try some 66' lines. My buddy had a Fox 45 in his and it was a spped demon, he switched to an OS LA 25 and it is plenty.
Jim