@Right2DiePainFree, @Ta555
"More of an exception than a rule."
What, if you or me are the exception? No one knows, but the intelligent people consider, they could be the exception by adding steps to avoid that by all available means.
"Partial being almost impossible? Where does that info come from? For Robin Williams and many others I heard it wasn't. Night Night a myth? Does the megathread also confirm it's a myth? As far as I read I saw someone was probably successful."
Partial method only works, if there is absolutely no SI anymore as this is the case with some prisoners and was the case with wonderful actor Robin W., who was found with a belt tied around his neck, wedged between the closet door and door frame, in a seated position, slightly suspended off the ground, like he was sitting in a chair. He suffered not only under Parkinson's disease but also under Lewy-Body dementia, so he was so afraid about the end of the life with this diseases, that there was no SI anymore, nothing, and the only reason, why it worked.
"Can I do Exit Bag outside without a chair? Maybe sitting on the ground and strapping myself onto a tree? Cover the tree trunk with something to make sure it or branches or anything won't break the bag."
The bark of the tree will destroy the bag. One must tape first some thin pillows around the tree at the region, where the head is. You can sit in a car in the backseat and fix your upperbody with the belt and the arms and hands with elastic loops or bungee cords. Never use handcuffs, because this will even stronger the SI.
"Some instruction recommended to zip tie the hose into the bag in addition to just taping it and cover the holes with tape. Then again, why are any holes a bad thing if there is positive pressure in the bag and it's supposed to leak at the bottom anyway?"
There is a flow. If there are any holes aside of the opening at the bottom, it can happen, that the flow will also flow some O2 into the bag at holes. There is good tape to fix the hose into the bag. But you have to test it if the hose will hold for at least 15 minutes with that combination of the bag and hose and tape material. There have been cases, people have been found dead, but the hose has flopped out of the bag at some time and was lying on the floor, probably after 10 minutes, because otherwise they would be still alive, of course with a brain damage.
"According to this person nothing works."
That's the untruth. The truth is, since weeks I am telling the people, that an expensive premium Scuba Mask set will work and that I do everything to make it work for some nice people on the forum and for me and that an exit bag as an unwanted alternative would work, if some dozens of small things will be considered. But the priority will be on the mask set. It's more expensive than N, but it has the maximum security.