Hi Toni,
I also have CRPS, as an after effect of surgery on my left hand to excise a Dupuytren's contracture
That was some 6 months ago.
After all the usual hand therapy, the swelling, pain, colour change, and all that crap continued, so they started me on a course of Stellate/Ganglion Injections, into my neck where the nerves enter/exit the Spine.
After 3 of these over 4 months, the results were very favourable.
However it has now regressed, and I am scheduled into day hospital on Thursday for another go.
I have not been turning for a while, I have used the time in between medical appointments, to clear out my Garage/Workshop, and make some much needed equipment to improve the use of space.
While vibration hasn't cause me any problem, I would like to add to some of the suggestions you have already received.
I agree with Ed,
1. Sand bags on the lathe stand or bench are excellent, as apart from the mass, that will resist movement, the individual grains of sand are almost fluid and absorb a great amount of energy within the bags.
2. The suggestion of using flap disk sanding to round rectangular blanks is sound, provided that the Angle grinder doesn't impart too much vibration/torque of it's own.
3. Regarding turning tools, as well as using broader/larger tools to ride over a bigger area, and the smaller bumps.
3.1 consider wrapping the handles with Tennis racket wrapping, or golf stick wrapping. These also absorb a great amount of shock and vibration.
4. Finally, remember that sharp tools do not require a "death or white knuckle grip" but can cut, being held lightly between a couple of fingers (with a bit of practice).
Are there be other turners, in Townsville or a Mens Shed who could give you some assistance as and when needed? if only to round off your blanks?
Hang in there.
Thoughts are with you,
Brian.