I like to use the Cheyenne hawk pen grips on both of my soul nova machines because then I can use my same old squishy 1 inch disposable grips that I have always used. Side note The disposable Cheyenne hawk grips also work on the soul nova with the exception of the largest hawk pen disposable grip.
These 1 inch grips work great on the sol nova unlimited paired with true grips so you get a nice memory foam grip.
The grip got stuck to my machine. Won't come off now