One other thought to consider. While uniform tension is highly desirable, it doesn't mean that all the spokes will have the same tension.
On a front wheel, which is symmetrical, all the spokes will have similar tensions. But rear wheels are not symmetrical.
While the rim in in the center, rear flanges are different distances from center, so the wheel is "dished" with right side spokes laying flatter to the wheel's plane than those on the left. Maintaining that asymmetry requires lower tension on left side spokes, typically 60% or so of those on the right. If you tighten those spokes just because they seem loose, you'll move the rim to the left, and off the correct centerline.
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