I had the same problem and changed out my idlers and problem fixed! Mine is a 6 rib. I also went ahead and put in the HD tensioner to loose the belt slip. Give that a shot and I bet your problems will be solved

 

I bought some 8 rib 100mm idlers off ebay that have double bearings in them so they stay straight and wont wear out. I have also broken a HD tensioner already.

 

Designing an independent drive for the SC is ideal but expensive. Abrupt throttle changes throw belts frequently, just a nature of the SC. With an independent belt, you can toss the SC belt and still limp where you're going. A stronger tensioner and higher flange pulleys help, but are no permanent fix

 

Yep....it takes a while but you actually "learn" how to work the gas pedal correctly to keep this from happening.

 

It took a few tosses for me to get the "roll out of the throttle" notion too

Its a good idea to keep a spare belt and wrench in the car because sometimes you just have to do it and theres always a risk of the belt being eaten