Locating a radar-detector display in the fuzzy hole would get people hanging off your left blind-spot to watch the thing. LOL!

I spent a day one recent weekend making templates of the fuzzy hole and a variety of LCD modules and found the 3.5" the best fit. The entire screen would be visible and there's just enough room for the module and the driver board. I plan on covering with matted and tinted Lexan so when it's off you don't see much. The module that's currently at the top of my list is TFT and has an image-reversing feature which is ideal for a back-up camera. Wiring it so it will operate automatically from selecting reverse is a cinch, as is adding a manual override switch for when you see just an antenna in the mirror while on the move.

When I do mods or installs I'm very particular on an OEM look, so don't get anxious for pics as this won't be complete for some months. But I'm more than happy to share any info to those interested!