I understand the complexity of these things and I am trying to do as much research on these issues but there doesn't seem to be a whole lot of sharing when it comes to this kind of information. It seems like one of the biggest issues when it comes to emissions is ensuring the complete burn of the fuel while still getting as much power out of it as possible. The fact that with the scotch yoke instead of normal connecting rod design the piston spends more time at TDC this allows a more complete burn of the fuel as well as maximizing the power extracted from it. Couple that with the fact that there is less wear on the cylinder walls and pistons and rings due to a lack of pivoting, not to mention much less weight and size combining two combustion chambers in one cylinder and you have a small example of how a simplification of design can help with several issues with one "out of box innovation". I'm not by any means saying I've got it all figured out and know all the issues I'm just saying that making nonconventional designs as a hobby with no big dollar company at stake can yield results that penny pinching corperations may not even spend a minute thinking about. And if it all fails and proves alltogether futile, then I will have had a good time trying. I want to know everything, about everything, while it is obvious that this is impossible it won't stop me from trying.