I was sloppy with my wording. A dial indicator could mean several things, and I envisioned it setup just like a depth mic. A depth mic (which has a dial indicator, LOL) would definitely be the easiest/quickest!
I didn't say it, but I was including it in my list. Whenever I say degree wheel, I always "assume" everything else. I should have included the dial indicator there. It's totally necessary.