tinman once bubbled...
Tim: why don't you submit this as a new thread in DIY section - ah I mean a board not body shot!
Take photo of design and see who has already gone down this path.
Might be helpful to get info. on suggested safety procedures
such as: how do you signal tow boat if required in case of diver entanglement - 2nd line you can tug for reduce/increase speed; mask loss or free flow generated by speed/water turbulence. Require geared up diver on-board for rescue, contingencies?
Design characteristics - means for DIVER to quick release board from line. Presumably diver will have hand holds to release himself but I'm thinking of entanglement again, i.e. zip through some fishing line which takes your mask and/or reg and snare you to board (bit of a reach I know but s$!t happens).
Low viz makes this a little more exciting than a scooter which you can independently operated. Maybe Mike D can jump in or you might email him for input...