Mill DRO

Hi,

I just purchased a Prazi BF-400 and I'm looking for a 3 axis DRO for it. The
cheapest I've seen with a precision of 0.0005 is the Shooting Star CBX 3d
for $750. Not a bad price considering how much other DRO's go for. Is there
anything else out there lower in price? I practically spent every cent I own
getting the mill. I know there is some homebrew DRO stuff on the web, but by
the time you purchase the encoders and such (at low volumes), and the time
invested, you don't end up saving that much.

Any help would be greatly appreciated!

Thanks,
Kory