heh,
I know what you mean about the difference between rear braking while standing and rear braking while sitting...
I think I have the pedal adjusted as close to "optimum" as is possible for me right now, but it still feels very much like I have to dig DEEP to get braking force while standing, and when I'm sitting, just thinking about using the rear gets it to lock up :)
Its almost like you have to adopt a completely different mindset while using the rear while sitting and while standing, but i guess that's just the nature of the beast :)
Someone needs to device a system whereby the rear brake pedal height is adjusted automatically to a preset height via a sensor which determines if there is pressure on the seat (braking while sitting) or if you are standing hahha! I know its ridiculous, but an interesting idea in a kind of useless gadget-like way :)
Feanor