Hi awk,
this first pic is one of my coils edge on.
I made these with a pretty crude coil winder .
I made these by applying polyester resin , as i wound them.
And taking the appropriate precautions as to not let the resin stick to the winder , by using wax or a crayon works well.
The second pic is another coil , with a view of the face.
If you were to drop your pole outer diameter to 21 cm in diameter , that will bring everything into sync.
and your machine will function better
This last photo is how it should look if you make your coil holes equal to the distance between magnets , like i do.
I saw your video , you need to eliminate the wobble ! it could be catastrophic just turning it by hand.
Dont forget the coil outer diameter is twice the magnet dia,