Putting the finishing touches on a M.E.N 40 its an old kit recomended engine is .35-.45 weight around 4.5lbs. I am sure I want to put a .46 just not sure on brand. This is a solid sport plane. [I know the O.S. 46Ax is good but at $109.00 is it really that much better then say a thunder tiger ect..... Their has to be other solid engines out there?[&:] any help would be great