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 (w/home-made furler), Sailing Rudder, SideKick Ama Kit, Daggerboard, iComfort Seat Pad, GoPro Hero3+, RTIC SoftPak 30, Seattle Sports Scupper Swift Cart