I just replaced the vent fan (Removed the chincy original and put in a Fantastic) and noticed the rubber roof is not "glued" to the top. Upon closer look there are several places where the rubber is raised slightly and you can press it down. Not a big deal though. I hope this helps.
Chuck - Sparta, TN
2012 Jay Flight 22FB, 2 x Honda EU2000i
2013 GMC Yukon XL Denali AWD
EDUCATION is what you get when you read the fine print.....
EXPERIENCE is what you get when you don't.