I started my Invisalign treatment yesterday. I have 38 trays to complete. The orthodontist group I see is a Top 1% provider. They recommend their Invisalign patients to change their aligners every 7 days instead of every 14 days as recommended by Invisalign. I was told they have treated thousands of patients this way & in their experience there is no benefit to wearing an aligner more then 7 days. I have 8 crowns on my molars so I am concerned they movement will be too fast. Is this safe?