KumiKreator Industrial Lockstitch Bobbin Winder Adaptor.
I have created my own adapter for a bobbin winder, I found I had to sand the bore a little, along with the outside until I had a nice press fit, as seen in my video below.
(When sanding please ware an appropriate mask and in a well ventilated area)
https://www.youtube.com/watch?v=jztY2SABblQ
I have been looking for a better way to wind the bobbins for the KumiKreator, what I have done is combine an industrial lockstitch bobbin winder and a universal thread stand.
I still need a platform and a motor to bolt everything down to.