D-Zero

I do however suggest doing the Sailjuice events as a priority.  The in-built 'weighting' is that most classes are sailed by good(ish) crews who are mostly sailing decent competitive boats (ie no significant dilution by a 'mass' of less-than-competitive (no travelling) club returns.    

Call it a 'semi-structured' sample if you like .. or at least one that reduces the dilution effects of 'mass returns' ...after all what we really want to know, and race with, is the potential of the boat netted out so that the handicap results is more likely to be determined by 'skill' or otherwise  ...of  the jockey(s).

The 'raw' Portsmouth system does not explicitly seek the potential of any boat - all it does is average what returns are made for any and all classes - regardless of other factors however critical they might actually be.....   Want a ‘great’ PN ?  Well don’t buy anything ‘new’ at all ... get a good example but of an older class with plenty of clapped out examples that are raced at great many clubs, and ideally by a fleet with a ‘wide spread of abilities’ apparent.  Their returns are just what you need if you want a class with PN ‘potential’ sunshine  ...

Could there be a better approach ? .... of course.  But currently don't expect too many favours - so bring along your new 'best friend' boats along to sailjuice and bang in some results.