Rocket only lists D12 motors for use; however it also says can reach 1600 feet, so I saw no reason not to be able to use a C11-3...besides, it's only about 4oz!  Motor seemed to be a very good choice since rocket lifted off fine with authority and reached about 700' (estimated).  Ejection was just past apogee and rocket came down on streamer; however it hit some hard pack snow and broke a fin (even with heavy fillets and holes drilled through body tube for fin glue points!).  I think having 3 fins increases the chance of breaking a fin on landing compared to 4 fins in my opinion since there's 25% less fin to disperse the landing force.  I may try a small chute next time.