So next, the worn backchecks come out and new backchecks go in. WNG backchecks are very height-sensitive with their checking surface abbreviated for better clearance and closer-to-string catching. To determine their optimum height, I compared old and new and ran samples. The original backchecks were higher in the bass and lower in the treble to work with hammer tails longer in the bass and shorter in the treble. Since I'll be custom boring the replacement hammers, I'll make all tails one inch. And all the new backchecks will then be the same height. I removed the old backchecks using a shop-scrap jig and pry bar, then drilled holes larger for greater-diameter WNG backcheck wires.
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