I have a reservation for a grand villa January 26- Feb 1. I wanted to add another day, Friday, Jan 25 to my reservation at the seven month window. No luck. I think that anyone who plans on staying in an OKW grand villa for a week or more better plan on having enough OKW points for the complete transaction. In the past I have had no trouble adding on, for this week in January, a few weekend days in a GV using my Vero points at the seven month window. Maybe this has broader implications? Buy where you want to stay!