Hi Bob,
Probably not necessary but I reprinted the printer target so I can cut it with a 1/8 inch white boarder and will make the final profile.
The printer target does have dotted cut lines around it so a white border is not required.
Should I be concerned about Exposure being only around 230, or 10X's on the Prism Target?
I think PP will tell you if it's under exposed. Eliminating the white border may help to increase the exposure a little. Are you using a black card over the targets on the scanner platen to screen the white surface of the scanner lid? I think that is essential; it need to fit the platen completely.
I don't think 10 X's is anything to worry about.
Terry