Scorpiomikey:
Care to donate one of the old boys to the cause?
And what cause would that be? 
There's a couple others I didn't include. They aren't of the Badger family. I'd love to take a Micron for a test drive but no one around here sells them. Something to aspire to though. lol Maybe a C or C Plus first.
As far as lubing goes, I take the brush apart and give any metal to metal moving parts a wipe with light oil. Not enough for it to migrate anywhere it isn't wanted. From time to time I'll wipe the front half of the needle with glycerin. That's it. You don't have to do either, that's just me.
Tony