I would have put a layer of 3/4" butyl tape underneath the flange then dropped the fan in the hole. If ever your self leveling sealant cracks, the butyl will be your backup protection.
Couldn't help thinking at the very end, when you whipped out the multi-tool; that would be a great tool to use (with the flat/toothless blade of course) to remove the lap sealant. Great install video. Thanks.
Is your camper a 2008 keystone hornet? I need to replace my bathroom vent too and forgot to measure it when I was at the camper. Lol. So I'm going to wing it snd buy a 14" vent fan. *fingers crossed"
