RE: evoloution trainer power system upgrades
I started out with the evo 46 on my LT 40 last fall with the 3 blade trainer prop. AFter I got comfortable I tried out different props.
I wouldn't say you are in for a disaster, but that prop will make a HUGE difference! It will be like you have a new engine. In a way it is nicer because you can take off much quicker. If it is too fast for you just throttle it down.
I personally have never removed the flywheel. I would suggest just using that prop you mentioned first and see how you like it. The fly wheel helps keep the momentum of the prop and may help keep the engine from dying at low throttle.
Good Luck!
Wings