RE: iSonic 111
Your sail quiver seems to be optimal for the board
I use the RS6 8,4 with a SL2 42 cm Deboichet fin for light to moderate conditions and the 36 cm stock (Drake) as the wind increase, when overpoweredthen I go for the 7.7 Code Red (a sail very similar to the TR3) with the 36 cm stock fin; altought you can keep this configuration in heavier winds (for my 87 kg) at sustained 20/22+ knots I switch to the ISonic 87 and 6,7 Code Red.
Sometimes I also use the IS 111 with the 6.7 when the wind is hard but unstable, keeping the 36 cm fin.
Isonic 2009 122/101/86 , F2 Mauiproject W 90 lts
Slalom: Code red 8.8 NP RSR 7.8/6.7 evo/6.2 evo NP RS6 5.4
Wave: NP zone 4.4 North Ice 4.7/5.3
The rider: Age 48 (yeah, I know, so old, but still on form)
Height 1,84 m
Weight 87 kg