Finally attached the interior fresh air vents to the fuselage. I used tank sealant vs the silicone that is called for in the plans. The hardest part is figuring out how to hold the vents up against the fuselage while the sealant cures. I used some safety wire pulled through and around the vent flap and hooked it to the fuselage side to support the weight and then some tape to hold the assemblies tight against the fuselage side. All came out nice.