http://www.whitesewingcenter.com/repairclass.php
You may not have yet gotten a reply from Ray, because he is on the road and/or teaching a class at his shop. He only does email when home and will not disrupt his class to take a cell call. As a matter of fact, cells generally do not work at his home/shop.
See his website comment on contacting him...bottom..
My husband and I have taken both Basic and Advanced Class. Roger had taken mini advanced classes as well, while I was visiting with a special collector and shopping. We hope to take advanced class again, as it is actually working on machines you bring as Ray circulates and, a needed, explains the problem and how to fix it.
Ray will be curtailing his travelling. He will teach in Shipshewana Indiana and at his shop in Belleville Missouri. Yes, the classes are expensive, but his knowledge AND friendship are invaluable.