I bought the
Wolfgang
Engineering Triple Bearing spindle off ebay. The seller, Richard Stethem,
apparently custom builds each one. The customized spindle mount was exactly to
my specifications and mounted on the Zenbot without fuss. Having milled one
tiny board on it, I have to say that the difference between this and the Dremel
300 is night and day, with the TB Spindle playing the part of Day.