Well, I finally received my fully completed tuner (thanks mlord!) and took it over to my trusty local CarToys to get it installed. Much to my dismay, they told me that it is very highly likely that it will not fit in my VW Passat dash behind the stereo, as there was barely enough room for the wires / harness, much less the tuner box. Anyhow, tommorow they are gonna rip it open for me and see if there is anywhere they can put it; if not, I guess I will be putting it up for sale here (unless someone can offer an alternative suggestion)..
If worse comes to worse, I'd sure hate to part with it, but at least it would have a nice home with someone here.