Humbuckers always Weak and Thin

[big_teee]

So moving forward, add wire guides and don't use quite so much tension.

Wire guides are more important with narrow bobbins.
You may be able to get away without guides on wider fender type bobbins.
IMO, I like them with all bobbins.
GL,
T

[Helmholtz]

To me it sounds like the high winding tension caused shorted turns.