If you have a caliper, it's probably more accurate and more convenient to measure 107 mm (47 mm + 2*30 mm for two beams) from the outside of the frame to the inside of the electronics panel.
I recommend this method.
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If you have a caliper, it's probably more accurate and more convenient to measure 107 mm (47 mm + 2*30 mm for two beams) from the outside of the frame to the inside of the electronics panel.
I recommend this method.