100% printable spool holder (standing or attachable to Rep2 & Cube2)

I got tired of the multiple, awkward spool holders that have poor angles and friction which frequently "slip" and make noise (leading me to come check on my print every 3 min). I designed this multi-spool holder in blender that is thin enough to support all standard spools, and those spools now float [almost] frictionlessly behind the printer. It's also 100% printable!

NOTE: You must print these together! (that's why the only files I submitted have both parts). Otherwise the long rods that print at the end print too fast and deform because each new layer starts printing while the previous couple layers are still warm and deformable. I explicitly laid them out the way they are so that the print head has to travel back and forth while printing, giving the layers time time cool in between.

I think I will update this design in the future to have the bar be a separate object that snaps into the two holders.

UPDATE: I designed this originally to attach it to my printer, but I didn't realize that it works standing up too! So it's not really specific to to Rep2/Cube2, unless you want it attached.

You must print these together! (that's why the only files I submitted have both sides). Otherwise the long rods that print at the end print too fast and deform because each new layer starts printing while the previous couple layers are still warm and deformable. I explicitly laid them out the way they are so that the print head has to travel back and forth while printing, giving the layers time time cool in between.

Also, at least on the MBot Cube2 (which is what I printed it on), the offsets are little weird, so I had to print it on the far right of build zone in Makerware. And it was still pretty far left for me. You will need to babysit the first layer to make sure it's in the right place for your printer

This was created in Blender, and was an excellent exercise in finding the best order of operations to create a simple object. For instance, I first tried making the outer frame, and then made the inner "hole" then subtracted the two. Then create the cylinders and boolean-union them. But Blender boolean ops frequently leave really ugly meshes that are messy and difficult to work with. In the end, I was able to make this without any boolean ops, only extrusions.