Axminster Eccentric Spiralling Chuck 

Can talk and say what’s going on?

Will this chuck fit on the SuperNova2 chuck?

Interesting just completed a pre holiday sampler craft show in West Springfield MA, made a couple of offset Christmas trees for the show that took some planning and doing just to be different which didn't sell so its hard to justify the cost of a speciality jig for such turnings even though this one is quality and not very expensive.

It’s a Spirograph for wood turning.

Spirograph? Cool, but tedious.

Can I attach this to a Nova chuck?

A touch more than a Ruth Niles chuck... But much more available.

do you have a easy way to sand those?

I don't see the use for it. Once in a lifetime. Maybe

I would get long allen / hex wrenches for quicker changes, you could go through the headstock to change index. Where can i get one of these? heh NM i'll just have to make one...

Tedious to say the least! The device should be adjustable without having to remove from the machine for every step. And the offsets should be infinitely variable, not reliant on presets. Even the simplest rose engine would be superior to this.