I have built the red box P-40 and it is a builders kit. You will spend alot of time sanding and shaping. My plane has retracts and split flaps and weights in a shade over 8 lbs. You need to keep the thing light, with a real effort to keep the tail light. Mine is painted with Chevron paints over .75 cloth. I then clearcoated it with the Chevron Paints flat clear, which in 4 months turned into flat yellow, which is another story. They do make into good planes that fly real well if you watch your self during construction. Good Luck, Dave