First the noob questions:
1. How fast can the TI go? I'm not sure of wind speeds, but without hiking out with just me in the back seat, my GPS read 8 mph tops and that had one ama mostly submarined. Is it normal and/or efficient to submarine them? When will it capsize? Am I sailing wrong? Seems like I used to go faster in a Sunfish.
2. The bottom part of the fins of one of my Miragedrive units is already damaged. The inner rod is exposed and will poke out in one direction. Apperently we abraded it off, our mistake. Are the fins replaceable or do I have to buy a whole new unit? How much $$? Any kind of waterproof tape to reinforce it in the meantime?
Finally got the tramps! Pepper getting her sea legs on her maiden voyage last Saturday:

