I got my kit yesterday. I bought it from tss-radio.com. It was a couple of $ more (<$10), but I'm paranoid about
ebay/PayPal. Got the unit in two days, which was a nice surprise. They also sent a card explaining the "162534" code with the kit.
The video helped out a ton. Thanks again for putting that together.
I did a couple of things a little different. I didn't have the center speaker, so there was no bolt there. I cut off a metal plate from an old squeeze mop, and just tie wrapped it down in that space. Seems to work fine (no rattles), but I may experiment with other antennae locations.
The other thing I did, rather than bolting down the units, I tied them together using the supplied brackets (one side of each bracket affixed to each module), and put some adhesive velcro on the brackets. There doesn't seem to be any issue with grounding, so I think it will work out fine.
Thanks again.