Kevin, it is my understanding that a G or smaller hybrid could be configured into an LMR or even a true under-1-pound model rocket, if you added the weight of the N2O to the dry weight of the motor and the unloaded weight of the rocket. Such a rocket would be flyable under LMR or model rocket rules, but you would still have to be a Level 1 to fly it. IIRC, both NAR and Tripoli have noted in their rules that hybrid fliers must be Level 1, and of course you can use a hybrid H to get your Level 1 cert.
My shipment of 29mm Skyripper grains hasn't arrived yet (and it was mailed to me almost two weeks ago...!@$@!$#) but if it had, I was planning to fly an Aerotech Barracuda with the Skyripper G at ECRM-32 last weekend. It would have been flyable under their LMR status, as they had informed the local ATC that LMRs would be flown.
Doug Pratt
Kev> With the introduction of the Skyripper 29mm motors, I suspect it would be
launched