QTR-Quadtone RIP

After baulking for over I year, I finally made the switch from the 
Piezotone quad inks to the K6 Neutral in my Epson 7000. I usually use 
StudioPrint for printing, but have been experiencing some weird 
linearization/profile issues, so I thought, since I own it, I'd try 
working with QTR again.

I had heard Jon Cone made the curves for the K6, and decided to try a 
print with the Hahnemuhle Photo Rag curves. It looked horrible! Strange 
posterized effect throughout. I tried creating my own curves (very 
rusty doing that with QTR) and found it would not allow me to create 
initial curves, saying the "name was illegal", which it wasn't.

Any thoughts?

Nemo