Could not get the scat tubing (2"?) on to the eyeball vent from the back. Well, I could, but then could not get the hose clamp on to secure it. The flanges on these Steinair vents are very shallow. Tonight I decided to remove the vent and tube and secure the hose outisde of the panel where I could see it and work it. That worked very well, but then I couldn't get 3 of 4 nuts back on the re-install. Took the vent back out and super-glued the nuts to the vent. Will try to re-install next session