Quick Change Spool Supports for 2020 Prusa i3

I like the bearing supported spool holder design, but wanted it to be easier to change spools quicker and easier. I have my printer in a cabinet that didn't really leave lots of room to pull the threaded rod out to the left or right. It was also a tight space to put the spool, bearing cones, etc. on and thread on the nuts. With this change, you can put the spool, cones, inserts, and nuts on the threaded rod, tighten it down, and have it ready to just drop into the arms. The arms hold the spo