I am pretty sure that this is similar to how the german Falk plans do it for ages. Sadly, I cannot find any english explanations. Update: its not. But if you a

I am pretty sure that this is similar to how the german Falk plans do it for ages. Sadly, I cannot find any english explanations. Update: its not. But if you are interested: patent (in german) with visual explanation can be found here: http://worldwide.espacenet.com/publicationDetails/biblio?locale=en_EP&KC=C&ND=2&date=19520331&NR=835219C&DB=&CC=DE&FT=D http://worldwide.espacenet.com/publicationDetails/biblio?loc...