Quote Originally Posted by Danielroyal25 View Post
There's one via solar.jean which I am tempted by, is a four bearing model but only has a 3 pin connector. Is this an issue? Can an earth still be fitted - does it need one?
You could easily change it for a 4 pin connector, or just fasten the earth cable to the spindle body via the spindle mount or tapped hole in the Z-axis, assuming they're all metal.

The 3-pin connector may imply it's an older spindle, since in the past these spindles used to exclusively use 3-pin connectors. Clearly that's just speculation though...as I've already mentioned, my spindle with 3-pin connector from solar.jean has been good and does include 4 bearings.