Two years usage now; E-max GT2820/04 brushless motor E-Max ESC and 3 cell 2200MaH batt. Landing gear mounting must be reinforced, also I use one that has larger contact area to spread loads to mounting surface. Push rod(s) housing/sleeves installed like a snake causing major binding of wire pushrod, I changed to ni-rods. Because built for electric I changed front hatch to hinge(fiberglass bi-directional tape) and magnet for easy battery exchange. Changed some of the other hdwr. as almost impossible to use/assemble. Maybe some of these issues have been corrected. Still ... if you have a good background & know what you need to correct, way faster than building a kit & lower cost. Will get another for spare when notified of sale.