Just did my first revision to the mini install. Just wanted to document it here for anyone who does the install and comes up with the same problem.
When cutting the console trim to initially get the iPad to fit, I had to trim into the heater/AC duct. Shown below:
At first, I didn't think much of it, but yesterday I was driving with the heat on high heat and full blast and it caused the iPad to overheat. Turns out the air was leaking into the rear of the iPad. So today, I bought some insulating foam tape and sealed the cut into the air duct with the tape (I'll try to take a picture of it tomorrow). The foam tape was actually perfect for two reasons. It of course fixed the over heating problem (full blast AC or heater yields no leak) but it also snugged the iPad around the edges and made it much more solid of an install.
To test the quality of the install I had the front camera recording and went out for a drive over some bumpy roads. When I looked at the recording, the iPad was perfectly still and the camera didn't show any signs of movement in the car.
Summary: use some adhesive foam around the back edge of the install to eliminate any creaks or wiggling resulting from cutting or sanding a bit too much during the fitting process.
The second thing I fixed was alternator/ road noise coming from the iPad. When the mini is charging (whenever the car is on) and the audio source is set to aux, there is a nasty whine that comes through the speakers. I've tested all my grounds and I couldn't pinpoint the problem. The issue came up even when I charged the mini through the cigerette lighter and connected it to the aux. To solve the problem; or more accurately, to patch it, I bought a ground-noise filter on amazon.
PAC Ground Loop Isolator for 3.5 MM Applications
http://amzn.com/B001EAQTRI
I've always been so skeptical of these things, it just doesn't feel like a solution to the cause of the problem. But after installing it, ALL of the noise disappeared and I didn't notice any drop in audio quality or loss in low or high frequencies. It worked so well I think I'm just going to live with it.
Lastly, I installed a matte screen protector on the iPad in hopes of reducing glare in sunny weather. Here is a picture during the middle of the day with the top down. I'm satisfied.
Picture with the sun shining right onto it
Picture in the shade
Quick side note, when making the charger for the iPad, make sure you buy at least a 10W 2.1A car charger or it will not have the juice to charge the mini.