If anyone has any pointers on demounting tires I am open for suggestions.
1. Try one or two yourself (looks like you can already check that one off)
2. Take the rest of them to a tire shop
3. Watch how effortless and quickly they do in moments what you struggled half a day to do...
4. Pay the asking price and smile

5. You can put the new ones on yourself, it's a whole lot easier than removing them, can usually throw the first side on, and simply pry the second one on.
5. use tire goop/slickum
I've been through this several times now, and can remove them when I have to, but if I have very many to do I gladly pay a tire shop. There are a lot of good tire folks out there, I'm not one of them and don't really care to be one either..
Grigg