I'm new to rocketry. I am looking to purchase a motor system and I am very confused. The Aerotech hardware and motors seem to be a lot more expensive then USR motors on ROL auctions. Is there a reason for this? Am I getting myself in trouble if I purchase the USR hardware? Will it work with Aerotech reloads? Does anyone know why the cost difference is so much? If I purchase Aerotech am I getting into trouble because they are going bankrupt?