Stackable spool rack

Stackable spool rack *from 3D printed parts and Ø8mm aluminum rods.Sturdy, stable.Infinite in length.Infinite in height (I found that a minimum of 200mm rod (vertical ones) length between racks provides proper access to load and unload spools from the rack)Infinite in stacks. What to print:bottom part; mandatory as it's serving as the bottom rack and the racks that are to comemid part; only if you want at least 3 rackstop part; the end of the stack - interchangeable with mid part (you can add a middle section later simply by replacing the top part with mid part)***print at least two of each component as they are needed for the left and right sideHardware:Ø8mm rods (can be aluminum, steel, stainless steel, you name it, just judge on your own if it can hold the weight)electrical tape (because 8mm seems to be only a suggestion for manufacturers, you can add a tiny bit of tape on the rods to make them fit sturdy in the holes)How to assemble:print the necessary parts, as mentioned earli