Qidi Plus4 adjustable side spool holder

I was having trouble obtaining a M8 100mm bolt for a reasonable price so I remixed it to use Imperial hardware. Print the aufnahme and mutter STL files from the original.

For the spool holder, the following hardware is required
5/16" - 4in Cap Screw
5/16" nut (nylock or blue thread-locker recommended)
¼" washer (tighter fit than a 5/16" washer). This washer goes between the arm and the spool.
qty 2 of 608ZZ bearing
I tried printing some bearings but the axial forces of the bolt holding it increased the resistance too much for my liking, though it was workable.

For the mounting point to the printer…
M8 and M6 hardware of the original design was easy to source but still more expensive than using Imperial hardware. You can use either mine or the original for this part depending on what hardware you get.
5/16" - 1.25 or 1.5in Cap Screw (1inch is barely long enough as seen in my photos)
5/16" nut
one ¼" or M8 washer (for a tighter fit on the 5/16" and better clearance to the other bolt)
¼" - 1in Cap screw
¼" nut
one #12 or M6 washer to get a tight fit on the ¼" bolt without colliding with the other washer (as can be seen in the photos).
These two bolts need to be firmly tightened.

I recommend printing the arm with 4-5 perimeters and 25% infill. I used PETG and it is quite strong but does receive vibrations from the printer. The slight flexibility of PETG or ABS will probably prevent the continual stress from causing structural problems over time.

I also found that placing the two optional printed bearing washers into the spool shaft before the bearings helps them spin more freely. They ensure that the inside of the bearing does not rub on the spool holder.

Do not overtighten the screw on the spool or it will not spin as freely. However, if you don't tighten it enough and didn't use a nylock nut or thread-locker, you're going to have a bad time when it unscrews itself and falls off. I also mounted the spool lower than horizontal so that its natural rotation “tightens” the bolt.

I modified parts so that it can accept Imperial rather than Metric hardware, which may be easier for some to obtain