iPad mount (not in dash)
I watched the YouTube video from lock pick to figure out how to get the dash apart. Then I took the measurements off the cubbie hole and fabbed up a bracket to mount in the bottom. I drilled a hole in the back on the bottom of the cubbie to run a bolt through.
I did something similar as FXfourXfour, and very less permanent. A block of wood cut to the interior dims of the cubby, then wrapped in leather. I then used a swivel from an old light assembly, and fabricated my own slide in holder. It slides in & out of the cubby easily, but when pushed in, stays in just by friction.
Granted, this is Nexus tablet and not an iPad.
Granted, this is Nexus tablet and not an iPad.

