Hi Mike
The presumtion is that the "hit " or modification factor in P rating for the 450 sq ft or any other now non 6/0 class sized spin used will in fact place it rated at a higher speed potential ,-it may not dependant on the P-number based on the Spring Fever regatta and other results where some very good N E 6-0 sailors had very good finish times . If these 1st place av finish times are used to determine the P rating number and it is rated faster than the same 6/0 with larger spin , --
-well it will be interesting .
The 6/0 # was rated slower this season than last, but again as more competition occurs in a class and cat sailors improve their skills resulting in faster finishes comparitively the number drops to a faster rating again , this scenario is also probable beyond the larger spin versions , if not initially set , largely dependant on who is sailing which version and how much the old 6/0 P-rating number continues to drop with fewer less experienced sailors racing them in P rating.
-The 6/0 version Todd has developed with sq top main as understood would not be class legal in this new spin 6/o class ,-or would any modified Express version with sq top or other C H version or earlier versions of the 6/0 ,-and also would not allow numerous other versions or modifications cat sailors wish to make to their 6/0 that may not conform to this new classes brand based rule.
Maybe a broader set of rules in scope allowing catsailors to quote -"controll their own destiny " in boat set up and allowed modification that would potentially include all these boats mentioned to race as a class and many more would be a good idea ,or not as is their perogative,--just a thought .
Hopefully discussion and honest direct comparison makes the sport better for all ,What ever your experience ,views understanding and resulting opinion, It is about racing and having fun .
Carl