Krashkart, The problums you ran into are not unexpected when installing a 4 stroke into an already built airframe intended for a two stroke. It goes with the territory. Had you simply gone with the intended 2 stroke (46 evo) or a slightly larger one it would have been a pretty smoothe and eazy assembly job. When you endevor to kit bash, ARF bash in this case, you are responsible to re engineer all the systems to create a functional finished product. Maybe some deeper thought before you started would have led you in another direction, such building a different trainer KIT custom made to fit the 4 stroke, or a different powerplant in this ARF. This part is NOT Hanger 9's fault. I agree that the other poorly glued parts issues SHOULD not happen but they do and are quite typical of most ARF's. Many of the other "off brands" are worse! I have experenced all 14 of the problums that Mike 109 lists and more. I once had a "no name China" 60 sized Spitfire ARF with the main gear retract pockets built into the wing well aft of the C/G where you would mount mains for a tri gear plane. What a piece of crap!!! So you can either fix the ARF problums as you assemble or kit build your own, which takes a LOT of time and effort plus costs much more than a comparable ARF to finish. Sorry, there is no good answer, PICK YOUR POISON!!