That looks very interesting. I cannot get sound on the video so not sure about the sizes? I would imagine though that with this innovation, Nature Boys are seeking to exploit that glaring hole in the Shimano market - i.e between 12000 and 18000 - in the same way that the SOM NL 16000 does.
I think it is very surprising that Shimano have not addressed this themselves, but put effort into creating a Yumeya 12000 spool when they already had an excellent Twinpower 12000 spool that fits the Stellas.
