So I've been following the Gohkale Method on and off now since 2009 and the first time I tried stacksitting I got immidiate relief. However, I was never able to quite master tallstanding. I even attended a free workshop where it was (sort of) explained to me in person.
For the last 5-6 years I've experienced a significant amount of pain in my sacrum from standing for any period longer than a few minutes.
Last week I converted to a standing desk from IKEA and had an epiphany... I bent my knees just a tad and allowed my pelvis to sag somewhat. WALA! I figured it out. The trick is to not just have soft knees, but to actually bend them a tad (I guess it's the same thing DUH) almost like you're preparing to sit on a stool.
All of the weight and pressure has transferred from my low back/pelvis to my legs and feet and man do I feel a difference. I can literally stand for hours without pain and just like stacksitting, the results were immediate. Also, my knee pain is starting to dissipate as well. It's a bit of a strain on my leg muscles but I trust it's because I've been standing wrong for so long, they're probably weak.
Anyway, just thought I'd like to share this little tidbit with everyone.