I happen to have RMS plus hardware (just the 60 and 100 casing) I got as a gift a while back. I'm hoping (as I have this specific hardware) to fly my currently under construction HV-Arcas using the F/G reloads available for this specific hardware. I noted (as I'm not certified) that I can a G54W w/o certification but there is an available G104 reload (both motors show on the NAR web site as tested between 81-85 nt-sec) that does require certification to obtain.
Before I became L1 certified I regularly flew a 3.5 pound rocket on a G80. I later learned that because of the weight of the rocket and size of the motor, I need to be L1 certified to fly it. I purchased a CTI 168H87 and flew the rocket with that for my L1 certification. I'm sure others in the club can provide more detail.
The following user(s) said Thank You: John P. Petrakis