QTR-Quadtone RIP

For information, I've been printing very successfully (from where I
stand) on Harmon Gloss FB A1 using the following settings with an
Epson 2100.

Paper type = Premium Glossy Photo
Resolution = 2800
Speed = bi-directional
Curve 1 = UC-EEnhMatte-cool 80% 
Curve 2 = UC-EEnhMatte-warm 20%

Advanced
Ink Limit (Shadows) = -50
Gamma (midtones) = 0
Dither = Ordered.

I know that I'm using matte curve sets, but it's producing strikingly
neutral, un-bronzed with clarity of detail and shadow that I've never
achieved on any other paper.  So far I've been printing A5 tests, but
I have no concern about printing at A3.  

Image sources have ranged from scans from Fuji Neopan 400 on a Nikon
4000 ED, Leica M8 (iso 1250) or Canon 5D (iso 1250).

I'd be interested to see how much better I could get with dedicated
curves...

Best

Chris