Hi John

How are you? Hope everything is going well for you and you are blasting around with stealth!
Are you planning to sail, at the lac de joux in august?

In the french part of switzerland, when you sail against different catamarans, they use the the ISAF handicap system.

In the german part, it is partly the ISAF handicap system or the Texelrating system.

I guess there is allready a handicap for stealth in both systems.

If you are looking for a handicap between all kind of boats (multis and monos mixed).
I don't know how they do it at lake of geneva, but here at the lake of constance (bodensee) they take the texel rating and use a factor of 0.76 to compare monohulls and multihulls. But this can be different from lake to lake ;-)

Here at the bodensee, there is the yardstick commision and you have to ask them for a rating. You just need to send them the spec's of your stealth and you get a rating.

Good luck!

Andi