I like your idea of making a database of 450's.
I would like to suggest that, as registrar, you solicit "City of location" to be added to the register. Maybe even: Cpe or Cab, Model, color etc.
Other possible inclusions:
1. Want to meet ?
2. Offer advice ?
3. Will share sources for parts, acc, things exclusive to the 450 ?
4. Do not contact ?
I'm sure there are more .
This could become a valuable resource for all 450 owners.
Donald LaFavor