Spool Hub and Spacer

After making the top mount hub holders (found here http://www.thingiverse.com/thing:1752018 ) I didn't like my method of spool hubs. Having a simple plate style hub mount is fine when you work with 1 company for filament, and they don't change the spool design, but what about when you want to switch out to something like a Taulman 910, or a different brand? That's where the progressive hubs come in handy. I looked at several designs and either I didn't like the slop, or the diameter, or the fact