Chuck- to accomodate the art stocks, here are my findings:
For Crane Museo Silver Rag, I have made a Custom Configuration at the printer LCD panel.
(doing it there allows you to run an alignment pattern and adjust) I set the gap to wide, the
thickness to 5, ran the alignment page, selected 5 as the one that looked perfectly aligned,
and left the other adjustments untouched. Then from my desktop, you can remotely
access that panel by using the Print Set-up Utility, the selecting LFP Remote Panel, and
selecting Media Adjustment, then Activate Custom paper. You need to press the "Activate"
button, not just select it. (This will then give you the same platten gap and thickness as
Epson Ultra-Smooth Fine Art paper, I believe). I had to do this because I was using Crane
Museo Silver Rag, and but that thick paper requires the thinner Epson Premium Lustre
Photo Paper Media Selection (Photo Black ink).
For the Art Stocks like Hahnemuhle Photo Rag, Hahnemuhle has a Paper Handling
Instructions as a PDF that recommends media settings based on what type of Hahnemuhle
you are using. If you are using a thick Hahnemuhle stock, and select an Epson Media
Selection that is also a thick stock, you are good to go. But if Hahnemuhle suggests using
an Epson Media Selection of a paper thinner than what you are printing on, then I suggest
going with the Custom Config as described above, as the edges of that thick paper may hit
the head as it passes over it and give you little balck head contact specks on the very
edges.
http://www.hahnemuehle.com/site/us/1014/epson.html
Hahnemule recommends Perceptual Rendering Intent with BPC unchecked, but try Rel and
BPC checked to see for yourself. They have their 3800 profiles in the same as their 4800
profiles, so try them and see if they are indeed "cross machine" profiles. hahnemuhle also
has Photo Black ink and matte Black ink profiles for the same art stocks so you can
experiment.
I have started some threads on the Luminous-Landscape Forum regarding this printer as
well.
http://luminous-landscape.com/forum/index.php?showforum=6