Steve111,
You used the word stunter - may I presume CL stunter? If so, I agree about weight and displacement concerns. We NEED to be comfortably overpowered...
For RC, however, the models use a bigger sky, and can take time and distance to spool-up some V. Only in out-of-sight-verticals and hover-type-3D is deadweight and prop thrust a concern.
Pe, by the way, my 30+ year old PAW 19BR did turn 11,000+ on an APC 9-6. Maybe I finally got it run-in?