Tell us about yourself!
So you are self sufficient? Electric tools , Solar panels and batteries. What do you do when you need new batteries? Whittle a few .
I really detest that term "fat cats" These are the people who make jobs for people who want to do more than sit in front of a monitor bitching about some fairy land where everyone is self sufficient . Fact is no one is and have never been . We all rely on others in some way.
You can do all the research you want but I would bet with this back yard project arguing about 1/2 degree is silly. Bet neither one of you could get the angle within 5 degrees
This does work. It helps to know how they are constructed and then visualize what you are doing.
Quick way I would get into video and vending machine I owned that had the locks buggered. Drive a flat screwdriver into the key hole . Use a crescent wrench to turn the screwdriver. Might take a couple of tries but all cheap and some better locks if you break the pins the lock opens. Some have cheap wafers and they are even easier.