On Mar 5, 2014, at 3:08 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
...
You don't ahve to mechanically balance it as well. Of course just
centring the disk accurately is non-trivial?
What?s the required accuracy? With some patience and an inexpensive dial indicator,
centering to .001 inch (25 micrometers) is doable; lathe operators do it all the time with
their 4 jaw chucks.
paul