My ?? for Chris after reading his & Delta 3MM's posts:
To get such a cert re-issued for a higher category, can one do it for just the few thousand extra point difference as if it had been issued that way in the first place, OR must one take a loss by redepositing & starting fresh?

I am considering a stay at Marriott Paris & some of my dates are open, so I may be willing to trade 35K DL + 30K NW for someone's Cat. 7 cert.