Hi Mike

Matching the current model US version I-20 specifications in F-20 limits all to equal basic design features just as F-18 accomplishes .
A preface favoring one should not exclude the other if intent is the same.

To close the "open" imaginary one of boat fears, an existing factory boat list could be added eliminating one of specially custom built cats.
The list of existing factory 20s currently available can be found here -all may undergo modification per F-20 rules and max specs .
http://www.catsailor.com/forums/sho...;view=collapsed&sb=5&o=&vc=1

Just as F-18 racing includes Hobie Tigers -Nacra F-18S -Mysteres etc -
F-20s are to include conforming makes and conforming modified versions of existing factory 20 ft cats in order to get started having the existing condition of US version Inter 20 being BUILT PER PERFORMANCE CATS lighter and having more sail area than existing EU F-20 cats specifically the F-20 Storm -Ventilo and Hobie Fox plus EU version Inter 20 ,and also existing 20s in the US .

It has to begin with racing sailors here , not necessarily Hobie EU or Perf cats.

The alternative as noted is to let them go the way of so many previous dead boat classes and get on to the lighter weight larger beam version 20s already available ,currently in a potential open category for the 06 Tybee 500 ,POSSIBLY A ht Formula 20 class in the future .
Either is fine .
happy sailing
Carl