Outline recommendations for a combination rating system would use ISAF and Texel base rating formulas {both being very similar} refined with a wind speed modification factor added at trapping speed ,this would allow design factors of beam -non board types, aspect ratio of sail area inc spin , and other measurement factors to improve the theoretic comparative speed potential of similar cat design , and also the needed chang from the general 100 base scale used in ISAF to the time to distance traveled scale used in P rating for real comparative annalysis.
Both SCHRS(ISAF) and Texel differentiate between board types, and aspect ratio of the sails and mast.
The only one missing is beam (and the last time I talked to anyone closely associated with SCHRS, this (including beam) was under discussion)
