I'd think the size of them would be a factor , i.e, are they small enough to be considered imperceptible? Sometimes if you take a scan of the comic, the light can reflect off it and it may show like a color breaking crease. Makes it a little easier to gauge the size of it. I'd think you'd have a shot at a 9.4 if all you have are 4-5 tiny NCBs
Take as good as you can pics/scans and put them on the 'Spare A Grade' forum. You never know what else other eyes may pick up on, especially if you're considering submitting it.