Spool Sleeve! For printrbot simple metal spool holder

I printed Vezkah's Printrbot Spool holder only to find that my spool differed from the type the design was intended for, My spool was hollow.
So I Printed this sleeve so i could still make use of the following part
http://www.thingiverse.com/thing:329569
the sleeve fits into the spools centre and provides a surface for the holder to support.

Thanks to Vezkah for an awesome easy print solution for the Printrbot Metal!