Finally got the cnc up and running and need to work on grounding my dust collector. It's a Chinese 4HP double bagger collector. I'm going to run a copper stranded cable through the hose and ground it at the dust collector end but I have a question about the dust boot. It is a metal dust boot with one side clamping around the spindle. It works pretty good at collecting all of the dust and is fairly simple to slide on and off to change bits. Is there a good way to continue to use it and be safe in grounding away from the spindle, through the wire in the hose or should I change it to one made from plastic? I could loosen the clamping side and put a barrier between it and the spindle for it to clamp to but not sure if that would be effective because of the close proximity to the spindle.
Here is a picture of a similar boot to what my machine came with.
dustboot.jpg