Micro Minnie 2106DS slide out wall dimensions

[Rubyhummbird]

Help! I've had my 2020 Micro Minnie 2106DS since last November, and have travelled quite often this year. On my last trip I opened the trailer door to find the bottom of the cabinet above the couch on the slide-out had fallen out onto the couch! I'm trying to find the outside wall thickness so I can secure a furring strip underneath the cabinet bottom once I get it back in !lace.
Thanks in advance.
BTW - I find it odd that Winnebago placed their own furring strip above the bottom of the cabinet and then secured the bottom to it with nothing but long stapes...