I don't know why the bearings created those marks over the sprockets, but the scratching was just me giving up and doing whatever i could to get it all on the reel.
It kept crumpling and coming off the reel mouth as I was loading it, the base is so thin.
If I ever try it again I think I'll do a better job.
I think I'd cut the head a bit smoother, and not pull it all out of the cannister before loading.
Also have a break if my hands start getting too sweaty in the bag