Ready Steady Eddy

[EddyCurrent]

Geoffrey, I was going to make it like that, but during some earlier trials, I found on some 3D stuff that if it didn't follow the tool down, then gaps around the bottom would appear in some areas.
Getting tension right might work but I can't see how it could be controlled very well. I was thinking that by some mechanical arrangement, the dust shoe could be made to advance at a slower speed that the tool, say 60%, I'll have to think about that.

Edit: now I've had some mackerel for breakfast thinking has improved. Looking at the pictures in my earlier post, the dust shoe is supported by two rods held in blocks with wing nuts. If those blocks were replaced by a tube with a spring inside this might apply the right pressure. As the tool advances so would the pressure on the springs and the shoe would lower slightly. Adjusters could be made to alter spring tension.