Oops, sorry! I meant to say it'll fit in my dash where the double din is because I have extra unused space surrounding the double din, especially horizontally (see attached photo). I'll just have to custom cut the hole for Galaxy Tab in the OEM plate that houses the OEM double din head unit. Thank gawd I have a whole extra OEM head unit dash for my car in case I mess up the cut.
I'm going to test doubleTwist on the Galaxy Tab first to make sure it fullscreens and performs well before diving into this project though.