News of anything in below the knees 100%, one million percent for bidin. And in questions? Absolutely forbidden. These are brilliant linkages that transfer energy from the knees and all energy there is massively destructive destructive to the system. No exceptions. Don't do it. Do not do it.
Item. 90% or more of energy is in the transfer to saul at the 1 or 2" cylinder at the full extension of the knees. As mentioned earlier in other posts the height of this cylinder moves from stroke to stroke but it is almost immediately obvious where it is every instant.
item. And 80 rpm which translates to just under 10 miles an hour on saul is optimal for efficient smooth power delivery and timing input, and input And location of the cylinder moment to moment.
Item. Most important, if there is one, most important is the completion of the transfer with saul every stroke, no exceptions, in the tiny cylinder, 1 or 2" in diameter, at the full reach of unease. If this is missed nothing else works for it if this is achieved everything else is likely to happen. In the exchanger.
Item. Next most important, number 2 or tied for 1st in importance, 0 energy below the knees, lower legs, ankles, feet. 0. 0. 0. 0. None. Do not do it. No exception.