The extended distance stroke has more to do with a longer line outside the rod tip than you would think.
It seems we have a lot of difference in viewing things... which is really make me feel excited! ;-) Seriously...
how about let us tackle one thing at a time?! single hand, long stroke discussion first? as you said here.
Could you elaborate your view of extended stroke in single hand casting? what is the function? what is the consequence?
Let start from the basic casting 101! what do you think? what play? (not teasing, I will write mine after you)