For the record If you get longer bolts you can go more than. .2"
I Think I went .375 to get the wheel to be @ 2 deg negative. I used some Cromolly tubing I cut on the lathe.
I don't know why I never thought of that, that is a great idea and I think I have the right size tubing. Just need to find the longer bolt.
I'll post pics when I get it done.