Z Top Filament Spool Mount for Ormerod

I wanted a more compact setup for my Ormerod 2 and moving the filament spool holder was part of it. I was inspired by Kiestenschieber's work here: http://www.thingiverse.com/thing:758259.
However, what I needed was something lighter, lower profile, so I designed this solution.

There are two parts to it: a modified z-upper-mount and the actual spool holder. I have used 625ZZ bearings, but really any bearing with a 5mm internal diameter should work. The bearings press fit into the mount.