CTS:
Hi, and welcome. I will test out the black ink once I'm back at it Wednesday and repost.
I understand about making the multiple marks, and it being a rough in tool, I think I may just have some bad white ink, aside from that it's pretty quick and useful. I prefer it to scotchcode markers, and putting panduit labels on.
Thanks for chiming in, I'll be sure to update my review with some black ink!