You guys are talking me into the kit again; I have an OS 70 in mind, it sounds like some of you believe it should take a bigger engine. There is always that fine-line between just the right engine and too much..... what is the concensus? I want a 4stroke and prefer OS over Saito..... hovering would be something new for me and I assume the 91 Surpass would be the engine for that. Keep those opinions coming.......