Is not that I don’t like the idea of the Nacra F16 (I like it very much).

Watt I mend is“ there are a lot of cat that can be modified to fit the F16 rule Box.”.
How can a Cat. be modify to be a compatible F16 cat?

In fact I want to do the same with my blast.
Example I can make my Blast faster whiff a lager rig (jip and mean sail).
A bigger jip is the les expensive. 13 sq.mrt mail sail is good one up handled.
I sailed my Nacra 5.5 whiff 16 sq.mrt one up up a lack not up the Noord sea, that is to rough.
Fore me 15 sq.mrt is a bit much fore the blast one up.