Quote Originally Posted by M250cnc View Post
Chuck a piece of quality stock.

Check with your dti run out, mark the high point on the chuck with a marker pen and note the reading.

Take out stock then repeat the process and check the readings.
Thanks, I'll do that tomorrow - getting late!

Just found this:

http://cgi.ebay.co.uk/BURNERD-7-5-3-...item2562cafe7d

Second hand might not be the best of ideas though.