Coil winding machine - GIF

[Frank S]

I have to agree. A person with the dexterity to correctly set the other windings as they were done would be careful to do what was required.

I would like a better look at the winding machine though.
I once wound a toroidal transformer by hand. trust me it is no fun. IE transformers are easy just wind the coils around a sq. or rectangular wooden peg then stuff in the laminate plates and tack weld the I to them. However a toroidal is vastly more efficient than an IE transformer. the magnetic field is more concentrated yielding a higher tesla they use far less iron in the core than the laminate type and one major plus is there is lower noise