1. it aint that simple. Light return and contrast compete a little and Fire is still not complete.
2. Fire and light return will also not acheive maximum results at the same time.
3. It is better to use a Sarin scan of a real stone and run that file than use anidiealised perfectly symmetrical stone.
4. The accuracy of all scaning equipment itself is itself an added error factor in quoting what might or might not give the best scores for individual features.
5. do you prefer a face up result, or moving average?
6. Single view or 2 eye view?