Quote Originally Posted by Andrewg View Post
Having an earthed tool so no crock-clip needs attaching before probing is clearly a huge advantage (I did check, mine isn't)
Damn. Did you measure where the continuity ends? Wondering if you could get lucky by connecting to the spindle mount? I'm using one of the Hyangyang 2.2kW spindles from fred, so everything is metallic and unpainted which probably helps.