I think these design drawings were produced by a guy from the USA. He was on the RBC forum but I can't remember his name. Was it Frank? Anyway, if it was the same one, he did get his designs made up at RBC and I met him on the day he came over for a vacation. He had them fitted and he wore them for the rest of the day. It was a real challenge for him to talk but he kept them in. I was getting Hawley retainers for the first time and also wore them for the whole day around the city. Awsome. I wonder if he has found this forum?