I recently purchased the second power supply unit(PSU) kit for my d1-server together with the USB Gigafilter cable/filter which I use to connect the USB port from the cubox board at the back of the server to the server reclocker's USB port. Installation of the second PSU was straightforward...
Re: Footers
I use Stein music's Super Naturals Plus footers between the components and the Symposium Quantum Signature bases.
http://www.steinmusic.de/webshop/product_info.php?products_id=26