Search:

What your wanting to do is called tramming the spindle and using a Set square with Steel in Collet is not good enough and won't be accurate.

Easy way is to get a Piece of round steel bent 90deg...

This is how I do it.

Get a photocopy or photo of the profile, fire up Sketchup and import it as a picture, use the scale tool to resize it to the exact size you require, on a new layer use bezier...

You need some slight adustment in the brackets but I would make them as good as you can then mount it all on the machine and with the longest piece of 6mm silver steel in the collet check for square...