QTR-Quadtone RIP

I've been trying to get the PK ink for my R800, Ultra Luster paper,  and a "correct" amount of the Gloss Optimizer to reduce bronzing.  I've used numerous combinations including 90% limit of the GL OP and a 60% limit of the PK ink in the QTR Curve Creator...still getting noticeable bronzing.

When printing from the Epson drivers, I don't get the bronzing (but don't like the tones and want the QTR control)...so they must have figured out a correct balance of Gloss in the ICC profile.

Does anyone have an idea how to solve this...any way to "look" at an ICC profile and see the mix of inks, etc?...or other combinations to try with QTR?

Thanks,
Terry