Just an FYI for anyone replacing the Flipper Vent:
The standard Ventline vent provided by Scamp has flanges that are supposed to insert into the range hood opening in the trailer.  Unfortunately the Scamp range hood opening is far smaller than the Ventline flanges, so the flanges have to be somehow completely trimmed off so the new vent will rest flush on the trailer surface - not an easy task. 

Near-final product: