I bought a vintage Knit Magic toy at a thift store, but it was missing it's tensioner. I couldn't find a clear enough picture to copy the original, so I made one in the style of the Sentro knitting machine. This is easy to print in PLA, and you just zip tie it to the machine and you are good to go!
You only need to feed the yarn through one slot, you can experiment to see which slot gives you best results.
The author marked this model as their own original creation.