Dale I to just recently bought a CBN wheel from optigrind. I had a small problem with my credit card being declined when I ordered it online. A lady from optigrind in the UK ( I can't remember her name ) called me about it. My card was declined because it was a out of the USA purchase. I forgot I had a stop placed on my card for out of the country purchases. It was this lady's day off & she called me from her home & helped me get my order processed. GREAT SERVICE. Delivery was quick too.
I put this wheel on my cheap 8" slow speed grinder & it ran smooth & true. I'm a very satisfied customer too.