You are right Bob..
When I removed the unit, it sets on a metal bracket attached to the wooden frame of the enclosure. My frame was only secured by two screws( one on each side) and they were not fully screwed in. Removed the brackey got six deck screws and to ensure the tilt to the outside put double sided tape on botton 1/4 of bracket...plus put double sided tape on ac unit front feet ( it had no way to secure it to bracket, so it slides)...now just waiting on my vent cover...
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