First and Foremost -.-.-.-.-.-.-.-.-.-.-.-
WELCOME TO THE MADNESS!
As always, it's recommended that anyone exploring the carpc install idea readover the FAQ's (at the top of the screen). Browse all through the forums and soak the experiences of others up like a sponge. Go to "search" and, well, search...
Tedious tho it may be, read, read, read. Some will tell you that whatever your questions, they've probably already been answered here. I find that to be generally true, although every install is delightfully different, filled with challenges and hair-pulling dilemmas.
I can't offer any advice about clean dash installs, as I have my 7' Lilliput 629 touchscreen mounted on a gooseneck mount to the right of my center hump, right by the passenger. I also have a few visable wiring bundles in my Saturn Wagon, and am just ok with that...
It's not recommended to install your carpc under the seat, due to dirt, dust, and well......intestinal gasses!