How to install A/C vent cover?

Just wanted to follow up on my earlier conversation.  As I said earlier, I used Duralock to attach the cover to the outside grill by placing long strips on the top and bottom and short strips on the sides, but the strips being long enough to cover from snap to snap.  After traveling in it over the past several weeks (one trip through the Owyhee byway with lots of bumps, dirt roads, etc. and my most recent trip in pouring rain, severe head and side winds through the desert between the Hagerman Valley and Boise), the cover didn't move an inch.  I have also washed the trailer several times and noted no water intrusion.  At this point, I feel comfortable saying it will work well.  As I noted before, if you use Duralock, it is expensive.  You also have to thoroughly clean the cover and the grill with alcohol prior to applying or it won't stick.  Finally, I have not tested its retention by putting it on, taking it off, putting it back on, etc., but it seems like it will hold.

Photomom said:

The vent cover I ordered from Elsie arrived today. No instructions, how to install?

Photomom said:

The vent cover I ordered from Elsie arrived today. No instructions, how to install?

Where can you order the metal vent cover ?  

@JohnDanielsCPA Any further report on the 3M product?  Still stuck on there?  Thanks

The cover is still attached after another weekend bouncing around in the dirt.  Washed it all down when I got home.  The 3M duralock continues to hold.