Ashhar
Just a few thoughts on Dexter's wire length suggestion. ?
A simple manufacturing jig is one way around this, one for each Toroid?version with a different number of turns. ?In basic terms, think about a sheet of wood, about A4 size, the working line will be the centre. ?
At the top you need a holder for the wire, I assume you are using reels, so it needs to be able to rotate with some resistance, so the wires not too slack. ?So a spindle with a crude slipping clutch, a sprung material covered portion of the spindle support would suffice.
A little lower down, you will need a guide ?support for the wire, it has to be at the wire working height above the board, nothing complicated, something like a closed cup hook, like the ones used on net curtails, screwed into a support above the board, This will act as a first guide for the wire.
Next a bit below the hook a further guide for the wire, a small funnel, again nothing complicated, how about the top of a washing up bottle, drill the correct sized hold in another piece of wood and glue it in.
Then a clamp, one of the toggle clamps used on test jigs etc. ?just to hold the wire firmly while winding.
Some distance below needs to be a measuring edge, again another length of wood across the board, more on this later.
Then the working point, a bit down again to give working clearance, about the distance you need the lead lengths to be I've used all sorts, the cap of a ball point to a simple pencil, anything similar to what your currently using .
Next another measuring edge, below the first by the length required for winding a lead length. ?On both the measuring points you will need a marking point, something like a small headed tack or panel pin to distinctly mark the measuring point.
Setup, open the clamp, place the wire roll on the spindle, tighten the retaining nut, ?run the wire through the first cup hook then through the funnel (bottle top) and under the clamp leave enough to reach the first (upper) measuring point. Close the clamp, the jig is now ready to operate.
Operation. Open the clamp, pull the wire down to the second (lower) marking point, close the clamp. Wind the toroid until there's only enough wire left to reach the first (upper) measuring point. ?Cut the wire, hopefully job done.
You may need to adjust the measuring points according to the number of turns on the toroid. You can use anything to hand to make something like this, you must have some ladies that are better than others at winding, use them to test your idea to make sure it doesn't slow them down ?too much.
I hope this gives you some ideas and helps you to retain the services of you ladies, and enable us all the order a uBitx sooner.
