Magnetic Mount Spool Holder
By Christopher Bray
Free
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Technical
1x 5/16"-18 x 3" Full Thread Hex Bolt
2x 5/16"-18 Nylock Nuts
1x 1/4 flat washer
4x 608 bearings (probably don't really need this many)
Disc Magnet Mount I found at Ace.
I had to open up the hole in the magnet from 1/4" to 5/16"
Also, the holes for the bearings are a bit tight. I had to squeeze them in using a bolt and nut (and a little hammer).
I put a very thin rubber band around the spool holder to grip the spool and make sure it doesn't walk off the holder.
Free