Excellent job and all by hand, congratulations!
If you ever need to wind more pickups, use an old turntable at the slowest speed, it works very well.
Back in the day, I modified an old Lenco turntable as it had the 16 and 78 rpm speeds too and used the original counter weight system (without the arm, of course) to have a kind of automatic right pressure wire appliance.
That said, I never heard of the leadwood (Combretum imberbe) and indeed it's a really heavy and hard wood, just a tiny bit softer than the African blackwood (Dalbergia melanoxylon) which is one of the hardest wood and really good sounding for a fretless.
I had a De Gier fretless with this African blackwood fingerboard and it was really singing very easily and absolutely not taking the marks of the strings, ... and soooooooo dark!
And for those interested, here is the top 10 of the heaviest (and hardest) woods: https://www.wood-database.com/top-ten-heaviest-woods/
Following this build with a lot of interest.
PS: I'm not showing off when naming the woods in Latin, it's only because it's the easiest way to recognise the species.