I finally ordered a Spartan CBN Wheel 8" X 180G from Klingspor's for $110.00, not an expensive one for trying out. I was amazed at the difference from the white wheels I have been using for several years. No dust, clean and easy. It trued up perfectly on my grinder using the concave washers.
After reading all of your postings about the CBN wheels, I decided to try one out. What a difference. I can't believe it took me so long.