I did some research including watching a video by a modeler who has an ALPS printer. He commented that laser printers, while producing a wonderful image, just doesn’t have the technology yet to run a decal sheet multiple times and have the image be in register, or alignment. So, overlaying decals is the only way to go for black or colors on a white background. But, having been a long time ALPS user, he said that the inconvenience of layering decals with a white background is nothing compared to the mess and hassle of the ALPS printer. I agree. I’m an old school sign painter who also silk screened hundreds of thousands of political campaign signs. Overlaying colors with multiple passes was the only way to do it. There were no solvent based printers that printed on corrugated plastic in the late 80s and 90s. Overlaying colors in multiple passes, or decals, isn’t much of a negative when it comes to making custom decals for a model I’m building.