ORIGINAL: Supa Koopa

Thanks for the help. It would seem I have quite a mixed bag of responses. Jester this is not meant as a cost saving exercise as here in Rip Off Britain we pay a lot more for this stuff. An OS 46AX is around $140, an OS FS52 is $200, Saito 62a $240 and the OS FS70 is $240. This is with finding the cheapest prices around, retail on the Saito is around $300. I have already built a 4*60 with a lovely Saito 82a in it, but have decided I should try a trainer first. I have quite a bit of flying under my belt but this is with Helis, so I am hoping my orientation transfers over. It's just the landings that will be quite a bit different. So my thinking is that if I do go past the trainer quite quickly whatever engine I bought could be used again. Now if I have bought the correct two stroke this will more than likely go the graveyard that is the spares box. I am a bit sick of two strokes from the helis screaming their nuts off all day long, so the four strokes were a bit of a revelation.
I can see what people are saying about the weight issues and this has made me think twice. Weights are OS 46ax 13.3oz, OS 52 15.3oz, Saito 62 16.4oz and the OS 70 20.3oz. I know I should be buying the 46ax but it just sounds like a scooter on steroids.

Decisions, decisions.