Was so inspired by the OP's work that I decided to do this myself!
- For my version, I made a couple of changes (pics included)
1. I used snap connectors between the run wire/ashtray, and b/w the run wire/garage door opener, so
both the ashtray and garage door opener are completely removable.
2. I located the garage door opener in the center console, under the rubber tray in the armrest storage compartment. This gives me easy access to the battery on the opener, so I did not need to hardwire into the car's power supply. Secondly, I can also still activate the opener if the switch in the ashtray were ever to fail.
3. I also very much like knowing that I can return the car completely stock for the price of the ashtray insert.
The Pics: (sorry, didn't take any during construction)
1. The completed ashtray
2. View of the Run Wire on the Ashtray End with ashtray disconnected.
3. View of ashtray wiring
4. Remote is under the tray
5. Rubber Tray and Garage Door Opener Battery Cover removed, showing battery
