Installed Thetford Vent

We installed the Thetford vent accessory to the Electra Magic toilet. It was about $35 shipped and took an hour to install. Some minor dimpling was necessary to the interior wall to expose the threads of the vent shank for mounting the washer and nut. A 5/8 circle bit was used to cut a hole in the wall. The exterior vent is about the size of a quarter and sticks out about one half inch at the opening. It does not obstruct anything when opening and closing.
Our TM is 10 years old and had no vent except the window. This was not a 100 per cent fix but for the time and money it was a worth while improvement.
I am going to try to attach pics.
Cheri