The principle of the dynamic diver is that the boat is always positively bouyant; IE: it displaces more water than it weighs. The Subcommittee main site has a decent explanation of the principles of dynamic and static divers. Check it out there or on Tim's Site
Give Skip a call if you have questions about the control surfaces. He can answer any questions that you may have.
I'm sure that someone else here has some experience with them that they'd be willing to share.
Edited By Bob the Builder on 1069217637