I use the 21 step 2.2 gamma scale from Paul Roark. I print that with Roy's print tool no color management on the paper i wish to profile. I let that dry overnight. I the read the scale with a spyder and get a text that has all the lab values.. I drop that into the linierize QTR script get another text and drop that into the icc script which gives me aan icc profile. I then can make a print using the Epson driver
Kelly