Just installed my PLX gauge but haven't completely wired it up yet. Also have a PLX boost sensor module to install too. I didn't know where to mount the gauge, didn't really want to spend $160 for an A-pillar mount nor wanted to increase the blind spot which is already bad due to the GIANT mirrors. So I took my windshield phone holder (made by Taotronics...like $10) by removing the screw that holds a small round threaded piece of plastic to the phone cradle. This piece of plastic is a socket for the windshield arm's "ball". This small round threaded piece was then super glued to the back of the gauge. The windshield mount arm's ball was then popped into the socket and then locked down by the threaded collar. It is completely adjustable and tightens up. This particular brand is great, the rubber part that goes onto the windshield became even more sticky over time so this thing hasn't fallen off my windshield for over 3 years and as sticky as it is I have complete confident it won't.
The one pic shows the camera from my eye level, and if you look closely you can see the windshield mount is actually below my field of view as the mount in within the view of the hood. I changed the color of the needle, values, labels, etc. to be orange to match my OEM gauges.
<Sorry not sure how to post images>
Here's my best attempt at posting images, hope it works for anyone...
https://drive.google.com/open?id=0B4...m03TmJIbjl2eU0
https://drive.google.com/open?id=0B4...TFodGtfSzFSalE
https://drive.google.com/open?id=0B4...3dpRlhYa3owbE0
https://drive.google.com/open?id=0B4...3V3S1RzNHVVc0E
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