We print a grid on the backing of our Instant Granite. We just feed our 5110-g which is comparable to the 651 with the backing paper up and print 51 copies of our 3' x 3' grid. We set the profile on fast print, 4 pass, and we are able to turn off the heat. Super easy. Takes about 2 hours to print the entire 150' length of the roll on our JV33 and 4 hours on our JV3.
Also, don't forget to make sure the take-up reel is turning in the correct direction.