ReadyNAS Replicate a NAS that has already been the destination for a Replicate process

Hello,

Let's say I have 3 ReadyNAS systems.

I replicate the Main NAS used for file storage to a second NAS over LAN, and then move the second NAS to a remote location where the is already an empty third NAS. ReadyNAS Replicate will then work over a WAN instead of a LAN between the Main NAS and primary backup NAS.

My question is:

Is there a problem replicating the second NAS to a third NAS using Replicate over LAN?

I would do this is order to save the bandwidth of the first NAS. Instead of doing One to Many replication, I would do One To One replication over WAN, and then use One to One Replication over LAN.

This would essentially be backing up the backup NAS.

Is this possible?

Also, is there any way to force a full backup every 4 weeks or so in ReadyNAS Replicate?

In order to restore from ReadyNAS Replicate, which backups do I need? The first backup (full backup), and all other backups? Just the latest backup?

The documentation is not clear about this.

Thanks.