Massively dank method! My story is the same as yours. I got the first blaster soak underway and then I'm gonna hit it in a few days with an impact wrench. Stay frosty!
Not everybody has a cheap seat post like that. On a good seat post, you have to cut it first ( that will destroy the post ) and you have to purchase another post, and scrap the one you take out. Make another video with a better post and repeat the procedure. I do like what you have done and how you did it. Everyone with this problem should be informed of this Pipe Wrench Set. Thanks.
Those washers were very common back in the day, and you can still find them on low end and city bikes, usually mounted on fixed fork bikes. Their main purpose was to keep the wheel straight into the forks drop-outs, so that in the event of the nuts unscrewing for some reason, or not being properly tightened in the first place, the wheel won't fly out. In short, it was a safety measure. Nice video, keep it up!
140 psi was based on my weight from the owner's manual. Look for the owner's manual for your fork in the link in the description to find the proper pressure based on your weight.