To make a short story long, I've always believed that Star plastic begins as Pro with some additives put in to make Star more resilient and better quality. Some Pro (and we're talking driver Pro here) is almost Star-like in quality, and some is a notch down on the quality and durability scale.
If Infinite Discs or Innova reveals what I-blend is, take their word for it, but I suspect I-Blend is a Pro-based mixture that is really good quality, Star-ish but at Pro prices. I also think it was an experimental mixture that went right. :thmbup: