All of them, Pimp. They all slide over a ski pylon & then have a cable running to the bow. For example; Ten Foot Pole, Skylon, Air Boom, etc. Some of these manufacturers also make a "tripod" style pylon that has a base plate on the floor of the boat, and two side supports in addition to the cable. These are typically not used on inboards though.
Jay, the cable only supports directly in front of the boat, not to either side. Cut out on the side of your boat & pull hard on the rope. Or better yet, do a jump or air roll. Under-rotate it a bit so the landing is a bit rough, but hold on & pull it out. Ask anyone in the boat if the pylon flexes. The taller the pylon, the more they flex.
I agree with TigeMike..... look into an aftermarket tower that will collapse lower than the factory tower. Towers made by Titan or Monster should be way stronger than any pylon & collapse as low or lower than the windshield.
(Message edited by bill_airjunky on December 31, 2007)