Need Inkscape help please to break a design apart

[Aloha]

Simple tool for tiling any image to break up large engraving into smaller jobs

I performed a test that better visualizes the problem. Here is an SVG with some simple raster images embedded in it in various configurations: raw link to test.svg test.svg on GitHub The left most image is a 2x2 pixel image rendered 2 inches x 2 inches with image-rendering set to optimizeQuality. The next one is the same image with image-rendering set to optimizeSpeed. The next is 4 SVG Rects in the same black/white configuration as the pixels should represent. The next sets image-rendering t…