I upgraded my coil winding machine. It was like this. It did work but could use a counter.
With this setup I simply zero the counter and thread the wire. Turn the crank until the counter reaches the desired count. It works well.
I'll have to build that AF amp. When I gather the rest of the parts.
The chief designer for the 40/80 receiver suggested this fab method and I will give it a go on my next project.
This is the circuit as I designed it.