Snapshot Pro: Limit backups stored within Google Drive

We are using Snapshot Pro to backup to Google Drive. You have an option to only store X number of local backups on the server(we don't want to store any backups on the local server but all on Google Drive). It would be FANTASTIC, if you could also limit the number of backups stored within Google Drive. There is no point of storing months old backups if you only want to keep a week or two of backups on Google Drive. It can be very time consuming to manually delete all the old backups off of Google Drive.