Not horribly accurate, but not horribly inaccurate either. Did a color change instead of a sharpie. Worked out great.
Not horribly accurate, but not horribly inaccurate either. Did a color change instead of a sharpie. Worked out great.
I found it to be accurate to within a mm or two, and to be fair, if you need more accuracy than that, you're probably not using your fingers!