Indium Spool hubs for the Solder Spool Holder v2

I made one of these: http://www.thingiverse.com/thing:552536
But doh! It seems to be sized up for a Kester spool. That, and I didn't have any 5/16 rod of any kind lying around. So, I drew up some spool hubs to fit an Indium 1lb solder spool.

I initially had the bearing axle at 7.9mm and the indium spool axe at 19mm. switched it up a bit to 8mm and 19.2mm to tighten it up.