OWC: Mercury On-The-Go Questions

Just a few questions here guys.

How do the "Do-it yourself' upgrades that include the MOTG enclosures work? Is the Hard drive installed in the enclosure when it is shipped? Reason I ask is because Id like to apply for the hitachi 30$ when buying:

http://eshop.macsales.com/item/Other World Computing/MS8U7320GB16/

But i need the label of the anti-static from the HD. And if it comes installed in the enclosure, I dont get that.

Just needing clarification! thanks

it appears that link is in fact NOT a DIY, so im going to now assume its installed in the enclosure already. DOH!