Quoted from Zitt:It's not fair to measure from top to bottom like that. The mating surface is the flat part of the skirt.
Absolutely correct. I checked this. Both the skirt and the upper portion are the same width in these parts. My measurement is accurate. The difference in actuator length is 1/16" almost exactly from bottom of skirt surface to the tip.
None-the-less, here's a direct measurement of the actuator length from tip to skirt. Difference is 1.9mm.
IMG_1983 (resized).JPGIMG_1984 (resized).JPG