Therefore needed a new flap. The XXL for 149, - seemed perfect, and has been more than a month also. The only Laborious had that hole in the basement door to saw larger because XXL. Otherwise, the installation ran without any problems. I was pleasantly surprised by both the sturdy plastic housing and the disc is as stable, the good and silent closing flap, the edge seal of the flap (little drafts) and the double locking mechanism. Our cat was detected when going out immediately.
The only drawback, if it is because of me seems to be the battery. As our cat can almost always out, I have not tried the various programming and can not write them.
So far, the flap works well, the battery indicator shows still on full. I would buy again.