Brett,
After skimming thru about 30 replies...
Even after 30 yrs of PAMPA, many of them involving efforts to standardize judging --(are we there yet? HA!)-- two perennial points seem to cause more worry than is needed. And another point bears some comment.
1. Sandbagging: -- sure, someone, somewhere may have tried to ride in a Class below ability to gather more crockery... Such guys usually were pretty well known in their areas, and not very well loved, if there were, indeed, any... Fear of sandbagging is not a reason to boost anyone too quickly.
2. Moving DOWN in Class: -- Many guys had flown better than they do now. Some change in whatever reduces their current ability. I know of no one who has voluntarily acknowledged a decline in skill. Friends who recall the better days would probably be as uncomfortable as the guy himself. Some guys do fall away rather than look bad. Others practice more to look better, again. Some even just hang on, good or bad. Up to the guy, and seldom seen as asking to fly in a lower Class.
And, the odd concern: Local standards vs. score history. Some areas in the USA are rich in numbers of very fine fliers: a bell curve approach would put many into ADV who would be the top guys in less populated (or blessed) parts of the country.
Is a local EXP from a low-population, or difficult climate region really up to flying EXP at a large meet with World and National Champs in abundance? Simple numbers, break-points, or whatever, don't define Class suitability well enough. Probably nothing can.
The best approach may be to let a flier enter a higher Class when he feels ready. If evident progress is undeniable, his club buddies, other fliers frequently met, and EDs at meets regularly attended can urge moving up. (In Tucson, some guys have been -- justifiably -- moved up by CD and/or ED. Their only reluctance had been feeling that they were ready yet.)
In a stunt-rich area, most guys know each other, and fly with each other frequently. Numbers might work there: judging should be more consistent, if not uniform; peer pressure can work, and progress is rapid, anyway. History over a season can be checked for consistency -- a rare 500+pt flight CAN happen to a flier who usually gets 400-460pts. Don't force him up for ONE lucky occasion.
Above all, let's keep it fairly loose and enjoyable. It's only which event we enter, not mortgaging a home... <G>