why is there 2 strings coming out of the sail. Do you have pulley there?
Also, since the Adventure is so long and narrow, are you using Outriggers? If yes, which? The Hobie Sidekicks?
This video is of an Adventure Island (trimaran) hull used in Adventure mode(kayak only- no outriggers) with the small Hobie sail.
The AI mainsheet has a pulley for mechanical advantage with the larger AI sail, hence the two sheet lines. As stated, twice a week I travel to work in it and not wishing to change the rigging I keep it in standard AI configuration.
I never use outriggers in kayak mode but I do use the Daggerboard on all points of sail. I've found that's all that's needed for stability. The DB slows heeling and gives you time to react.
Funny, but I sail the kayak more this way than as the fully rigged AI. It's great fun on shorter trips but hiking out does get tiring. I've usually had enough after about 2 hours.
I save the fully rigged AI for longer more demanding trips than my commute.