so my dad thinks i should work on spins with my wakeboard on, fins off, on the trampoline... <BR> <BR>is this gonna damage by board or the trampoline? thanks

Depends on your board....I use an old wood wakeskate with no bottom contours. Screw in some shoes and you're good to go.

My sons took the fins off their boards and it works fine. To give it more of a realistic feel we took the rope and tied knots in it about 3 ft apart and hooked a couple of bungees in the rope so it always has tension and yet you can pull it tight. We are using an old CWB SOL and and old skate board deck with shoes screwed to it.

Depends on what board you have some will tear up a trampoline with the molded in fins.