I think that point extends further. This entire idea goes away when efficiency in the tooling is enhanced over time. Sure you can get some extra power back fr

I think that point extends further. This entire idea goes away when efficiency in the tooling is enhanced over time. Sure you can get some extra power back from your waste, but next time you retool, the tech might make that proposition useless. It's like if you invested in a system to get energy back from you car exhaust, but then the next model year is so much more efficient as to make the tech obsolete.