I'm having a difficult time figuring out how to print a borderless print on a custom size paper (24x36). I'm using a 24" roll and have selected the borderless>retain size option. The manual tells me to build the image size to 24.23" which I've done but I get a 1/4" border on the left side of the print (looking at it from the front of the printer). Anyone know what I'm doing wrong? By the way, when I select one of the presets (24x30) it works fine. Thanks, Jim