I have built two and there retracts are junk. BH Models supplied retracts are also junk. ESM ARFs take no more time in assembly than other ARFs. I have built kits and ARFS from a variety of manufactures. I won't methion the best and worst but there out there. ESM has a nice looking ARF but they weight to much for the wing area provided. That's the reason I choose the Hurricane as my second ESM war bird. It has suffient wing area to support the overall weight of the airframe. These, ESM product line, are not advanced ARFs to assembly. I again would advise to stay away from them unless you have piloting skills to match their aerodynamics.