I just saw your question. I use Circle Lord all the time. I have an A-1 machine so it is not just a Gammill product. Michael, the inventor, lives in Canada and you can purchase over the internet. His company is called Loricles. It is a fantastic product and makes quilting soooo much easy. He has design boards as well as the Circle Lord attachment. If you go to the website, there are videos that will give you a good idea as to how they work. Their business practices are superb...he has a payment plan and I have been dealing with him for about 8 years now. I just ordered 3K worth of boards...he is only a phone call away if you need help and returns calls promptly. I am not affiliated in any way, just a happy customer.
Michelle