DAA Automatic Brass Marker
First off ditch the sharpies that come with the unit. THEY DO NOT WORK. I gave up after an hour, did research on Eno's and ordered the Brush Sharpies.
Once I got the Brush Sharpies it took less that 90 seconds to get it to work.
I would give 5/5 stars if DAA shipped the unit with markers that worked.