I used the back of a vernier caliper to measure from the top of the adjuster to the top of the housing that the adjuster sits in. This ensured that they were both equally set. Mine are at 0mm
Oh... and the adjusters are SUPER soft aluminum and will burr or mark easily. I used a thick flat screw driver wrapped in black tape, sadly they still look like they have been touched. The adjusters are $35 each if ya really beat them up.