Not exactly model engineering but someone might be able to help.
I needed to separate a ball joint on my VW passat (as a precursor to replacing the front wheel bearing). Standard ball joint separator tools don't fit (it's a large ball joint and VW make a tool 3287A).
This looked like a good milling exercise so after an hour or so I had scaled up version of a standard scissors type ball joint separator.
After trying to use it I successfully bent the 16mm x 19mm section which I used as one leg of the scissors, but did not succeed in moving the joint.
Never having separated a ball joint before maybe I did not design with a sufficient margin of strength?
Does anyone have any tips on ball joint removal?
Alan