This is the new ducted fan jet that they call an arf. all that is done is the covered tail sections and the fiberglass fuselage. we have to trim, fit, trim, fit..... over and over to get the fan unit and motor in. The directions are terrible so you have to guess at a lot. out of a ten i would give it a 1!! Would I do it again... HELL NO. i will never buy one of these nor suggest it to anyone!