Prints prefectly! The operation is so light that even my 4yr old son can enjoy it, fun for all ages! I combined all parts on 1 plate and printed with a simple layer colour change after the gearsets were completed to add a desirable effect on the housing.. The assembly is simple and all you need is an allen key and some lubricant for the gears. The acceleration is phenomenal and the flight distance would be around 30m.