Curious, how do YOU check valve guides with the "wiggle" test?

I've always took the valve out and measured with a micrometer at multiple points on the good area and worn area.
Then took the valve and put it in "upside down" valve in the spring side and wiggled it then to see how much its worn. (unworn portion of the stem into the valve guide side)
That gives me the wear of the guides. Add the two up and a good backyard measurement is had.