So I've drilled the holes for the bridge screws.

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All happy now.

I clamped the neck and ran the strings and although the B string "looks" close to the edge, it doesn't really vary as it goes down the neck from the distance to the edge at the nut. I think it'll be ok.

I've ordered a dingobass upgrade bone nut and some sprague caps. Still umming and erring about upgrading the pots as well. I'm a little scared of enlarging the pots holes from their current 8mm to the 10mm needed for the Bourns pots.

I'm pretty convinced I'll never be able to put full size pots in, such as come with a preamp system. The shape of the cavity puts the holes too close to the edge:

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I've filed the inside of the jack hole so the jack slides in firmly. Previously it got stuck part way.

I think I'll be doing something to recess the jack a little.
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Pushed all the way in, the jack doesn't shape to the curve of the body - of course.

A bit of sanding (dremel?) should make a slightly leveled area that the jack rim can sit more or less flush against.