i was thinking about this 39cc, i think it is gonna weigh a lot for this spad! my brother in law also has a 25cc 1.2 horse husqvarna saw that he would give me.. anyone ever used one of these engines? i think that without the engine, otherwise ready to fly the spad will weigh in around 7lbs so i think the 39cc will be a bit excessive.. what size prop would you guys recommend for a 1.2hp 25cc husky? i think i will just stick with magneta and gas/oil mix. how do you guys generally mount these engines? have any of you guys just tapped the crankshaft end and bolted the prop on? thanks for any advice in the way of converting, not buying! i want this to be a cheap ordeal, as cheap as is safely possible!