Cant? I thought the 3-3's were the thruster trailer, which would be double foiled, so I got that wrong. If those aren't double foiled, you won't gain the characteristics I noted above. Again going from memory, which by itself is scary
, those 3-3's might be double foiled as a quad trailer - do check before plunking down any cash. At least I got the "trailer" part correct!
Cant is the angle of the base of the fin to the tip as it angles out towards the rails. Increasing the cant leads to a more responsive board through turns, while decreasing the cant makes the board faster, down-the-line.
They come in 4, 6 and 8 degrees right? 4 would be the fastest down-the-line and 8, the most responsive in turns. If those are double foiled, I'd stick with the 4 degree. If they aren't DF'ed, skip them.