hi aerotech kits are a builders kits you just have to take your time,yes most of the parts do not always fit properly but that is what modelling is all about, i have several aerotech planes i.e 2x b25 mitchells,hawker sea fury,mosquito,and they all fly fine as long as you check the c&g and the control throws you will be fine.i know a lot of people slate these kits but i think they aregreat and would not hesitate if someone offered me one for sale .