Hydrodynes came equipped with Airguides and they are by far the best for waterskiing IMO. Both our boat and swvski1's family boat have new old stock Airguides. They are no longer in production so if you run across either a pickup or a speedometer like the ones used in the 18 and many other older boats let me know. I'm sure we can sell them here. I occasionally see the pickups in marine surplus stores and I generally buy all they have because they do break. I have exhausted my supply of pickups. I did find this replacement which is similiar and looks to be more rugged: http://www.skidim.com/prodinfo.asp?number=769B jim
Jim, I've used this replacement pick-up from that company on my old Dyne and it worked perfectly. I did have to enlarge the mounting holes for it to line up with the existing holes in the hull. Bob