I use them when sailing and fishing on my Adventure.
I put them in the highest position when sailing, but I heel over so far they do drag. I just got the daggerboard, so that might fix the issue or I may not need them at all for sailing.
When fishing, I put them in the lowest position. Its still easy to move along down a bank from spot to spot. I am also able to stand up very easily without feeling like i'll fall over.
2011 Hobie Mirage Adventure
ST Turbo Fins, Sail Kit, Sailing Rudder, SideKick Ama Kit, Daggerboard, iComfort Seat Pad, GoPro Hero3+