I have an older 2015 or so basic Specialized Fatboy that I want to reduce the weight on.  I've already swapped the fork and wheels and tires.  My next heaviest is likely the stock SAMOX crank.

From what I can tell it has a 100mm spindle length running through a PF30 bottom bracket.

Anyone have any experience with some Chinese carbon cranks - that can point me in the right direction of links to one that would fit?  I'll probably go to a 1x setup as well with a NW chainring (that's easy enough to find)...but the bb and crank measurements have always confused me when looking on line so I never know if I'm buying the right thing.

Appreciate the help!