NDMP Configuration

I have a tape autoloader to be attached to the backup server with a single tape drive. I need to configure one NDMP backup of NS 20 and backups of a few other servers.

I have planned to configure this drive as a non-NDMP device and configure NDMP backups to happen on LAN using the -M option of the nsrndmpsave command. Once the NDMP backup is over on a volume of its own pool, it will pick another volume from a media pool designated for indexes.

Is this configuration correct? Does anyone find any challenge in using this kind of configuration?