Hi Rob

If you have the Euro version N-6/0 sail area main jib spin ,-
just for comparison purposes to the N A version that Performance Catamarans uses that would be great .
The Texel site is very thorough-explainations are clear -and concised.
Rated Length -Rated Sail Area -Rated Weight inc average crew -that forms the basic rating formula ,-then add percentage for spin use .

The windspeed factor as originally planned now added in just 2 catagories would be simple and clear enough to be actually used .
Just crews on trap or not wind speed number High or low to determine and apply to that set of windspeed rating numbers listed .
The upper windspeed could then be used to rate effects of beam . and board type efficiency ,-at higher speeds when they actually become a speed increasing factor.-Seems needed in Texel , again as originally planned.

With a windspeed factor added to Texel as outlined based mainly on beam along with factoring in board types would correct larger beam cat designs like the Tornado with 10ft beam in higher wind .
The results of numerous races bear this need out .
The Steeplechase results here resently as example .

The other aspect suggested of adding an efficiency factor based on P-Rating to older boat classes to help keep them competitive in handicap class seems the ideal accurate solution to rating all cat design together ,-
It becomes a combination system applied only to older boat design where needed.
Again class racing groups should take priority in all racing ,
but rating classes need to be accurate and reflect reality on the race course.