Thanks for sharing your horror story with us and how it worked out in the end. I'm preparing to tackle the dreaded #4. I've been prepping with Liquid Wrench that according to some YT vids tests superior to PB (besides I can't stand the stink of PB). I have acetone on hand for cleaning aluminum welds and your video convinced me to give it a try along with the LW.
Take your time. If it moves slightly thread it in and out a few times. When it moves free at that point back it out just a little further until you feel resistance then thread it back in and out. Do this in small increments. It'll come out. Don't force it.
50/50. May need to add some acetone if it sits in the dispensor for a while. It seems to evaporate. If you don't see the liquid micro bubbling on the sprayed surface I'd add acetone. Will be more pink color too, not so Tranny fluid red.
