Homemade electric door. Used an old clipboard for door. Built tracks from scrap lumber. Bought Add-A-Motor D20 online ($80) and used Insteon I/O controller for 12v operation and magnetic contacts to read open/close status. All sunrise and sunset settings programmed with the ISY controller for all Insteon controls. The door will also open during the night if the temp rises above 80 deg. ie. A/C failure, fire, etc.