The main difference I remember is that the HK had the chin cowl formed seperately, where as the Hobby Barn, the chin was moulded into the fuselage, and if you wanted to enclose the engine, you had to cut the chin from the glass fuselage, fabricate a plywood frame to attach the chin cowl to the fuselage The HK was far superior kit than the HB, (sorry HB, but my honest opinion).

Frank