[trux]

Thanks, Kerian, for the details. Sorry, I did not mean accusing you of any rip off. Finally, AFAIK, Eric did not patent the fluid goggles, so there is nothing wrong in building similar (or cheaper / better) goggles based on the same princip. I only thought that Eric desired some credit for the invention. I already saw selling fluid goggles on several websites of different freedivers (among others also on Martin Stepanek's website), but none of the freedivers bothered to give the well deserved credit to Eric. I think that mentioning the origin of the idea would be polite, and that's why I wrote about it here. There was nothing personal against you or any other freediver building liquid goggles.