Sunward Sky bender is an excellent model for what I hear and is a great intro rocket to clustering because it is only $19.95, Sunward eruption is a wiked cool 4X18mm canter cluster rocket don't forget the clip whips
not really a recommendation, but an idea. I kit bashed an Estes FatBoy and fly it on 3 C6-5s. Wasn't hard to do and it flys great. The fins really need some reinforcement. The Balsa doesn't hold up to the extra weight on landing.