Just tackled this thread today...
Quoted from Mr_Tantrum:a quarter circle is cut out of the corner of the protractor at the intersection of 0 and 90 degrees which rests against the flipper's shaft when taking measurements.
May I respectfully request that you redo these measurements, this time making sure that the corner of the protractor is actually up against the flipper shaft? If the shaft is really where you indicate, no wonder the flippers are wonky! Normally it's right in the middle of the semicircle at the end of the bat.
Also note the protractor has itself moved considerably between these photos, as I point out at the 55 degree mark and with the circles. A little scotch tape does wonders.
Not cropping off any portion of the bat or the protractor would be helpful in the analysis, as well.
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