QTR-Quadtone RIP

My K6 inks arrive soon and I have installed QTR in anticipation of
that day. My printer will be an Epson 1280 using the K6 inks and
Hahnemuhle Photo Rag paper. I've selected the printer and printing
model but am a little unsure about Curves in the Curves Setup. Do I
select K6-2800-HanPhotoRag in both boxes, leaving Blend at 50; or
K6-2800-HanPhotoRag in the left box only, leaving Blend at 50 or move
it to 100? It's a little unclear for a first timer with this software.
Any help, particularly screen captures would be appreciated. Thanks.