Bongo Fury

I had one of these held in by two screws - it was split where the screws were so I got a replacement vent. I undid the screws and the vent fell into my hands. Like an idiot I decided to take off the other vent. I then could see how these vents are held in situ. Although damage had been done to the split vent in taking of the other one I ruined it's mountings to the roof felt. So I now have two good vents that will not stay in situ no matter how hard I try just the action of shuting any door makes them fall out. Any one managed to secure these vents gggrrrooan - put on the lists, don't do that again, I learned from this.

got a picture

silicone comes to mind

I think what I'd be tempted to try is to make a new mounting piece out of thin plastic sheet which could be inserted behind the headlining for the vent to clip into.

Thanks ppl I will try the plastic first - does sound like the way to go

are they not held through the felt using the plastic posts and a push on internal star clip thingy, try a large thin washer then the star washer.