Jeff, I've learned a lot about wakesurfing this year, though I'm still a relative newbie. I don't know the various board classes, I've read about pin tail boards, and I think the a fish is also a class of board. So forgive a little ignorance, I'll do my best.
Other than the Victoria board that Jim also brought today I haven't seen a skim board up close. Jim said that he was trying to make a cross between a skim and a surf style board. The board had a single shallow fin, maybe a 1.4 inch rainbow. Jim does a lot of lip sliding on this board and can get the rotation for a 3, but he has the same problem I have, he ends his 3 on the other side of the wake.
The bottom of the board is fairly flat and has fairly crisp edges. It has good speed but it wasn't the fastest board on the boat today. Even though his board only had one small fin it was pretty stable, we had a first time surfer on the board, he had no stability problems.
I'm about 6'2", Jim and I are about the same size, I'd say this board is about 5 feet long, but I didn't ask Jim what the length was.
Jim puts two stomp pads on his boards, including his Striat Trippn' board, his Phase 5, and his Victoria board. The stomp pads are placed serially, one in front of the other, not on top of each other. Most everyone rode with their back feet on the front pad. The front pad has a center hump, it was nice to know just by the feel of the pad where your feet were. One rider wanted the pad on his Victoria board moved a half pad width either forward or back, but not where it was located. I think if your adding your own stomp pads to a board you should ride it a few times first then decide where you want it. I love the Smiley face on the stomp pad