The Muck gauge you have has been modified. The gauge came from Steve with the scale, aluminum block, two pins with points, and one pin that you hang the prop on. One pin is set flush with the back of the base, which you index the prop on. The second pointed pin has a thumb screw that you can tighten after you set it on the part of the prop blade that you want to measure. Then take the provided scale an measure the height of the pin, that you just tightend. If you make up a new pin, with a "foot" on the end that you measure, you can use a dial calipers to measure with. Richard DGive Steve a call at 1-972 380-9274 (his business #) I'm sure he will tell you how to work it!
Don
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