Different sled, but I'm also running the 47c belt; that's what Gates cross-references to the Polaris 080 belt, even though the added width and length make it a poor choice for a drop-in replacement. Be aware that the side angle is 28º, 115 is 26º. Not a show-stopper from what I hear, but the 48C and 45C would have the "correct" side angle for the AXYS. I also noticed that the top cog seems to kick out from the base angle; could that be why it tends to engage the primary at idle more?
Anyway, I had my clutch serviced and side clearance set by IndyDan, so that took care of the side clearance (which was negative when I first test-fit the 47c: it would wedge before it got to the hub). I set and aligned everything to spec, but found I had to open up the belt deflection more than usual. Otherwise, it wanted to pull a little at idle, and sometimes squealed between idle and engagement. Maybe the C12 just needs more deflection than most? Regardless, one season of riding down, and everything looks like new. I need to get a second one and break it in so I have a good-to-go matching spare, but I'll be surprised if it goes bad any time soon. Better men than me have tried and failed to blow the C12!