The colors from the 97SE vary from the other prints we have, and are a loose reference.
Check out the comparisons here:
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http://originaltrilogy.com/forum/topic.cfm/Comparison-of-GOUT-JSE-SE-laserdisc-vs-35mm/topic/17315/
The LPP and other sources we have are accurate enough.
Cleanup is several steps, including physical cleanup on the print with chemical solutions by hand. Then it is scanned, and commercial software is used for the remaining parts.
We are also replacing damaged frames with better sources, and higher resolution scans of frames with lost details (mostly starfields).
Team Negative1