that actually sounded like such a low tech solution that I wasn't sure if it was some kind of joke that was going over my head. Thanks for sharing, that's actu

that actually sounded like such a low tech solution that I wasn't sure if it was some kind of joke that was going over my head. Thanks for sharing, that's actually really fascinating. the patent for anyone interested: https://www.google.com/patents/US4040294 https://www.google.com/patents/US4040294