This was great for E9 LKR and C6 LKL. Both changes could work with one knee lever, with a couple of bellcranks and a little locking mechanism.
This has never been released, but since Mac is no longer with us, I am making this public.
It not only saves space, but also the cost of an additional knee lever kit.
Here are the plans:



I hope these will benefit some of you working on steels.