Recommend a high torque non cart rotary.

[asA]

Axys rotary has more than enough torque to do anything. Runs slow and low... so good for dots and whips for sure.

[visualamor]

I was just checking them out on Kingpin's website.
I would prefer a linear machine, I like to use 3's and I hear things about dots being oblong cause of how slow the machines go.