Flat spool holder

Just wanted to put up the filament spool holders that I use alot.
Its a simple design that require a 10x19x5 ball bearing and some doubble sided tape (the tape is not needed but makes it works alot better)..

when changing spool, you can use the old tape, just move it to the new spool.

Here are some bearings that will work.
http://www.ebay.com/itm/10-pcs-6800zz-10-19-5-10x19x5mm-Metal-Shielded-Ball-Bearing-Bearings-/321685112581?hash=item4ae5ed4705:g:arsAAOSwPYZU9Yos

https://www.youtube.com/watch?v=-Pn04Mvt3S0