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solvecraft/docs
jyviko 2ae53d387f Preferences: metric tapped holes drill only the tap maker's drill
The Design preference metric_tap_drill_major_less_pitch, which gave new
metric tapped holes the major diameter less the pitch (M8: 6.75 mm), is
removed with its Holes section, its session field and its labels. A new
tapped hole given no diameter drills the tap maker's drill (M8: 6.8 mm);
a custom metric size the table lacks still takes the major less the pitch.
A saved preferences file that carries the key loads as before: serde
ignores keys Prefs doesn't have, and the key is not written back.

The preference's UI test becomes an engine test of the default drill
(M8, 1/4-20 UNC, a given diameter) and a prefs test that a saved file
with the removed key still loads.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-30 16:19:33 -04:00
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