I have been needing to disassemble my extrusion unit a LOT due to clogs and heat block replacements. I have a set of acrylic markers and decided to color code groups of screws and put the same color around the holes to make it a lot easier to identify what goes where. I didn’t think of it at the time, but I am also going to add that color to the hex wrenches too. Since Creality wasn’t nice enough to use the same size everywhere, I wish they did this at the factory.