After market pulleys..

I run a March under drive, two groove crank pulley. At the time I was running power steering. I was throwing belts at 6500 rpm. Bought the pulley no more belt throwing. Never really slipped the belt, but rolled and threw a bunch. Not to mention I was running the stock A/C crank pulley which weighed 14 lbs! compared to 3 lbs for the march pulley.
I too have the march to groove underdrive pulley as well. I used it when I had the electric water pump and all I ran was the alternator. My stock one was too fast and like I said I wouldn't make it past 2nd gear and the thing would fly off! Align my pulleys up with a 3ft metal straight edge. They're spot-on and my belts are tight and new. Anyways I thought that hundred $70 setup looked kind of slick and light and direct. Once everything gets to be just so you start looking for stuff to spend your money on LOL...
There was no reviews on it I was just wondering if anybody had ever tried it....