I've posted this before but here it is again:
1. Make a tiny dot with a fine point pen on a small piece of Scotch tape. The tinier the dot, the better.
2. Stick the tape on top of the bearing housing, with the dot directly above where you *think* the pivot point is.
3. View the dot from *directly* above and swing the arm back and forth through its full arc. If the dot moves it's not above the pivot point. Move the tape and try again.
4. Iterate as often as necessary until the dot remains stationary. Voila! There's your pivot point.
Should take about 30 seconds,
Doug
P.S. If you have a Feickert, verify that the dot stays exactly beneath the pin as the arm swings.
P.P.S. Agree about the Mint.
1. Make a tiny dot with a fine point pen on a small piece of Scotch tape. The tinier the dot, the better.
2. Stick the tape on top of the bearing housing, with the dot directly above where you *think* the pivot point is.
3. View the dot from *directly* above and swing the arm back and forth through its full arc. If the dot moves it's not above the pivot point. Move the tape and try again.
4. Iterate as often as necessary until the dot remains stationary. Voila! There's your pivot point.
Should take about 30 seconds,
Doug
P.S. If you have a Feickert, verify that the dot stays exactly beneath the pin as the arm swings.
P.P.S. Agree about the Mint.