Originally Posted by
JoeTBM
Agreed but if they are sealed bearings ... If OP has one bearing incorrect I would also check the placement of the bottom one as well.
Thanks again JoeTBM, the bearings are 'open', if that's the right word... I have put them both balls down, as it were, because the bottom one balls up had a large gap that looked wrong, and the top one just didn't work balls up. So, both bearings: balls down, (and hopefully no balls-ups! 😂😔

Photo of assembled headstock for your kind consideration in the album.