38 cm => 7.2
36 Cm => 6.7
Change your 6.7 Hellcat for the same in 7.2
Don't use 5.9 Excess on the Futura, his real range is 6.2/7.8 flatwater sails...
When you need the 5.9, it's time for your small board
The Pryde chart of use for a 80 Kg gui.
Hellcat :
Excess :
So funny Excess 5.9 & Hellcat 6.7 have the same range...