Well I havent flowen the Hanger 9 Cub yet but I am not overly impressed with the gear...But for 1/2 the price it is a steal...It is hard to say how it will hold up untill I actually use it...I dont care for how the rubber bands go on....I like the Robart set up better but then I am farmilliar with that and in all fairness I need to give the Hanger 9 gear a chance...For a ARF gear it is far above the norm...I would not be afraid of giving it a try...The bottom of the Hanger 9 Cub is 6 5/16" wide which is about the same as the Sig Cub so if you want to put the gear on a Sig Cub it should fit but the BUSA Cub Fuse is about 7 1/8" wide so it won't fit the BUSA as well....Robart makes two gears....One for the BUSA Cub and one for the Sig Cub....