Air conditioner install consists of 3 pieces. Shelf rests on window ledge (routed out a little channel to sit on the ridge of the window), 2 little hinged feet rest on belly band of Perris Pacer
, 3rd piece of wood goes inside camper and is bolted to outside piece, making it nice and stable. So far, duct tape seals the openings. Can't find something we like that works better.
(Holes are for drainage.}