I just ordered the Pro 5.0 shifter from lightningforceperformance, and just thought I'd let you guys know it was on sale for $250. I was torn between the Pro 5.0 and the Tri-Ax, but the sale sold me on the Pro. I had the Pro in my 98 and loved it, so I hope it is as good. It doesn't seem to me many people are running it on the 500s, or at least not talking about it.