It was originally my idea and the manager at Calvert Sails had a side biz of making them. Then he quit Calverts and went on his own and then quit producing them. He was also supplying Murray, but after he quit the job, Murray found another supplier.

So, I am no longer associated with the product, but still very willing to help.

By the way, due to some of the posts on this thread, I have made some modifications on the use and installation page on this website.

Rick