Tom:

Here is info:

Hobie 17 1-up H17 74.0 78.3 76.2 73.7 69.6
Hobie 17 Sport Slp 2-up H17P 74.5 78.0 74.7 74.0 71.5

MN For non-class legal mainsail, of same sail area or less than class legal mainsail (formerly square top adjustment)
0.995 0.990 0.990 0.995 0.995

JU For larger than standard jib

0.995 0.984 0.990 0.995 1.000

The boat does real well with this rating.

Doug