Filament spool - Prusa i3 acrylic 8mm frame

You need to have 4 bearings in sizes 608,
and 4 pcs. http://www.thingiverse.com/download:1149952

you need to print 4 pcs. "Prusa i3 acrylic 8mm - filemant spool -2.stl"

and this element after application of the bearing secured with glue (I used thick cyanoacrylate glue)