This woman here is doing a technique very similar to what I’ve developed.
as is this one
I’ve heard a lot of people say that this method couldn’t have been used in the middle ages as it isn’t productive enough. It’s too slow and they would have developed something faster. The reason it’s seen as being too slow is that it takes longer to twirl the spindle than let it free-spin. But, faster spinning wouldn’t help here as it takes just as long to evenly draft out a thread as it does to spin it up. Notice how in both videos their hands are both in constant motion. I notice in the first video that the lady is constantly adjusting what she’s drafting and pulling out snarls and lumps etc. Her spinning hand does not slow her drafting hand at all. If anything, it’s the other way around.
I wonder how they prepared their fibre in the 15th century. With many wonderful modern preparations drafting can take no time at all so maybe fibre prep could be a contributing factor to the spinning method that was developed.