Having worked in a Grind shop, before I retired, I know the value of true running grinding wheels. I have a 200mm x 25mm diameter grind wheel bench grinder that I want to be able to true the wheels up on. The making of a jig is the easy but of the job but, trying to find a company that will supply a suitable diamond in a round holder is becoming difficult as those I have e mailed so far, don't bother to reply to my E mails. Does anyone know of a company that are a lot more customer caring that might be able to help me?