(Animation is of me trying to copy-paste the same object over and over, but each time I paste it, I need to move the edge of the object one pixel to the right, move a whole object one pixel to the right, then repeat.)
If you have problems: 1.- Post a sample (or samples) of your file please. 2.- Please check here: http://tavmjong.free.fr/INKSCAPE/MANUAL/html/index.html 3.- If you manage to solve your problem, please post here your solution.
All I needed was Edit --> Clone --> Create Tiled Clones.
Clones can be moved by precise pixels by using even percentages and items with even pixels. I was quite clever in how I achieved my desired results. Here's a gif animation to explain it. And yes, the slider comes out to be perfectly pixel-accurate.