[RayBarbeeMusic]

The bobbins are normal sized (for DiMarzio) and not overflowing.  10.8k of 43 is roughly equivalent to 8.5k of 42, number of turns wise, which would be ballpark correct for A5 and the stated output.  Might be and in-between gauge, hard to say.  Why they would have gone with 43 instead of 42 for that number of turns, who knows.  The Duncan "Screamin Demon" is wound with 43 but #turns roughly equivalent to an 8k ish 42.  No idea why they did that.

[gregr]

43AWG provides an increase in capacitance and resistance per turn over 42AWG. The Screamin’ Demon is slightly darker and has more growl than a 59. It also seems to be just a touch weaker, though not in any appreciable way; I mention this only because Duncan classifies it as medium output and I believe that to be misleading. At the end of the day they are different, and seeing that my favorite bridge pickup is the TB-12 I’m glad they decided to manufacture an under-wound 43-gauge design.