Gregory's Server
Nice knots!
To make necklaces I use 1 mm waxed thread closed with a handmade fisherman's knot, not as nice as yours.
Thinking of improving my speed to make some 1000 pieces, I've discovered the "knotter" below, made for textile factories, with absurdly complicated mechanics.
Cool tool, but the price is ~ 300 € + VAT, so I keep making handmade knots.