As promised, I'm following up on my review.
Been using this machine for about 6 months now and it's KILLER for linework. It'll push anything you throw at it from a tight 3 to a 14rl with ease.
Carson gave me a breakdown of the cams that he's come out with and what they're used for. As follows:
Neuma Stroke Profiles.jpg
I bought all of the cams, but have been using it primarily for lining. Again... couldn't be happier! I should mention that I also own a Dan Kubin Sidewinder (version 2) that also lines like using a sharpie, and I've been using that for a few years but have switched to the Neuma 4 almost exclusively. The only thing I'm using the Kubin for is for pepper shading. If you turn it down to almost nothing (like 2.5 to 3 volts) with a tight grouping liner, the pepper shading it does is unparalleled.
I have switched out the cam in the Neuma a few times for black and grey, but I still prefer my Inkjecta Flite 2.1 for black and grey. Maybe I'm just used to it and haven't given the Neuma much of a chance yet to see if it can deliver the same results as the Inkjecta.
So those are my 3 primary machines that I'm using for pretty much everything that I'm doing nowadays.
If anyone wants any more "technical" details, try looking Ty Palotta's review of the machine linked above in my original post.
...and if you're looking for a REALLY nice liner, I would HIGHLY recommend the Neuma 4.