I am building (I built one, but might change it a little based on the trans I use) a center console, the tablet mounts just under the dash in front of the shifter. Its not as awkward as it sounds. Glare shouldn't be an issue at all. Once I figure out the tablet to use (something sub $200 with Android 4 rooted) I will figure out a mount system. I would like it to be easily removable.
I was going to put it in the dash, but I don't like that idea (even though I cut the hole out already
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