How big is the Zero Bluffman? In my opinion 1/64" is plenty wide for even the large scale stuff but 1/32" is workable in the larger scales as well. It is amazing to me how well 1/64" wide lines stand out on the finished surface so I don't ever use anything wider msyelf. I've seen 1/16" used on some giant birds which I think looks awful but not everybody shares my opinion which is, of course, all I'm offering here. Looking forward to pics of the Zero whatever width the panel lines may be!