So, Again... Who IS doing the 20% bottom and 20% top not using and not charging thing.? Not one person actually said that they are doing or are going to do this...

With the numbers that ended up and (nobody has yet contested), why not do it?

2.5=2.8 X $382=$1069.60 instead of $533, is going to be 50% cheaper with the 15Ah battery used 60% capacity.
4.0 X $382=$1, 528 instead of $658, is going to be 57% cheaper with the 20Ah battery used at 40% capacity...