Wowbagger

Interesting how opinions differ! FWIW I'm a big fan of keeping models like the Extreme 3D light. Therefore I reckon if you're gonna go for a stroker then it has to be the YS 63 and if you're gonna go for a 2 stroke then either an Irvine 53 or OS50SX. I haven't had any personal experience of the YS but several in my club rave about them. The Irvine is great value for money and will swing a big, wide prop whilst I gather the OS likes to rev a bit more but will still cope well with something like the Extreme. I wouldn't recommend a TT61 it'll be too heavy!! Hope this helps, happy flying

Andy