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- Sep 5, 2013
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- 3,720
I think I remember the first part of this question from a while ago, and if I recall correctly the “H” represents a spacer which, depending if it it is in the front position or the rear position, affects which gear wheel engages the lead screw. Why they chose to use an “H” wasn’t clear, but the most popular guess was that it was short for “Hempty”