Is it really? I've looked into this a good bit myself and it seems that many who have tried this have trouble keeping the diameter consistent.
I suspect that if it really was trivial, then you'd think just about any commercial supplier could get it right, there's a lot of junk filament out there. Maybe you are just very good at it; +-0.02 is pretty good even by commercial standards. The entire first page of Amazon best sellers are +-0.03 or +-0.05.
Is it really? I've looked into this a good bit myself and it seems that many who have tried this have trouble keeping the diameter consistent.
I suspect that if it really was trivial, then you'd think just about any commercial supplier could get it right, there's a lot of junk filament out there. Maybe you are just very good at it; +-0.02 is pretty good even by commercial standards. The entire first page of Amazon best sellers are +-0.03 or +-0.05.