The arm and hook are like on the original, but the Hub has been redone to work with both 3 and 6 adjustable arms as well as to fit the Ultimaker mount.Just print a hub and the amount of arms you need to get a super-sturdy filament spool for your Faberdashery (or other) filament. Then print the the following files from http://www.thingiverse.com/thing:33461:fluxline_rod.stlfluxline_cap.stlfluxline_spacer_big_spool.stlfluxline_Spool_mount_V3.stlFasten the rod to the spool mount, the spool mount to the Ultimaker, add the spacer, then the spool and finally the Cap.