Hi Al, thanks for the feedback. It's not my intention to steal your designs, the only purpose is to improve the speakers. Considering that there is no option to purchase the work from you, I am looking for an alternative solution. I would be proud to know that my work is appreciated all over the world, it always depends on the point of view. Leonardo created the Mona Lisa and it is the only and unrepeatable. I don't think he would be offended if anyone reproduced it. There would always be only one Mona Lisa 😉