My experience with the Powder Pros before getting the cut ones was on an '04 Vertical Escape Polaris. I term them "scary" because I would pull a climb and then turn out and start back down. The hill would be rough, maybe from other tracks or maybe it has bumps/holes/lumps on it. I would hit one of these spots in the snow which would unload the front suspension a bit and when it would come down, if it came down harder (tipped over a bit) on one ski then the friggin' things would grab and the sled would cut to the side.
It happened a couple of times so I pulled them off and went back to the SLTs which I really liked. I was discussing this with Jack and he said, "Yea, scary isn't it". So in my head I'm thinking that if Jack Struthers says they are scary then they ought to be terrifying to me.
The first of the next season Jack called me up and said he had found a fix for the problem and was sending me a set to try. That was 2, now going on 3 seasons ago and I have been running them ever since. I don't know what it is about cutting that piece off, but it made the ski super predictable on those downhills.
Others have complained about other things and that this also fixes them, but this is what I experienced.
sled_guy