After going to Hi-Techperformance and looking at the "Ultimate Wear Ring" that Duane designed and brought to the market I personally thought it was the cat's meow. I am just curious why someone would choose to run the older style wear ring/insulator combo? By no means am I a pump expert nor would I ever claim to be, so I would like to hear what others think about the currently available wear ring set ups, which do you prefer, and why?