I have been attempting to add flecks of colour to yarns by untwisting and then retwisting them.
Here is a wee video of the machine I've been using.
There is a good reason why what I'm trying to do isn't working, which I shall go into tomorrow. I'll have to make a video for that too. It involves the mechanical nature of the actual machine.
I had it in my head that you could do both S and Z twist on it at the same time, but that is clearly impossible as all spinners spin in the same direction due to being driven by the same drive belt.
I hope it's maybe possible to reverse the direction of the belt, but I doubt it, I think this is just an S-twister.