I still have an Excel spreadsheet on my computer for calculating the Diamond Club miles needed for redeeming flights - can't bring myself to delete it!

Also have some Tutbury crystalware in the cabinet (anyone else remember these?) from the very early days of Diamond Club.

Best redemption for me was Lufthansa First Class MAN-FRA-DTW, we deliberately booked a longer layover at FRA to experience the Lufthansa First Class terminal with private passport control/security and personal transport to the plane.

Happy memories!