Encrypting NAS Under RT-N66U With Entware-ng

I have the Asus RT-N66U with Tomato v.132 installed, Entware-ng installed on a usb key, and I recently got the Vantec NST-400MX-S3R installed with 2x2TB harddrives mounted running in Raid 1 and connected to the second usb port. I wanted to know if it was worth encrypting the NAS under the RT-N66U using the crypsetup package available from the entware-ng repository, or if anybody has done so with a similar setup? Documentation is sparse and the only page I found discussing the proess is:...

Encrypting NAS Under RT-N66U With Entware-ng