This is a nice, clean, minimal spool stand. It requires no hex nuts, no screws nothing except 4 standard 608 bearings !! See build instructions.To build your spool stand print : Get 4x 608 bearings and clip them on the spool-stand-side axes. Clip spool-stand-standard or spool-stand-printrbot on the spool stand sides and you're done ! Caution : depending on your printer's precision, you may need to sandpaper axes and parts ends a little bit.