Hmmm, I'm not sure about this stand-off thing!
I was given one and tried it and it slid into place but it felt so insecure and "free to move about" that I wondered if I had fitted it wrongly.
I lowered my tailgate, being super careful that the catch would bite into the bracket and it was fine:
I then opened the tailgate to remove the bracket and it was so difficult to remove that I had to take a step back from the idea of removing the threshold cover to investigate further!
It was properly jammed and after a solid 5 minutes of swearing managed to force the thing out.
It transpired that the power latching hadn't kicked in when the tailgate was opened and the latch was in it's closed state preventing the bracket from being removed easily.
You can see that the latch pin moved slightly from the position which it is usually in when the tailgate is opened:
Once the bracket was forced out of its position and after the tailgate was closed properly (without the bracket), I tried to install the bracket again and it slotted in and out just as easily as it did when I first tried it!
Can someone please let me know if I am doing something stupid here? I seem to be being beaten by this simple little device!
Edit: Tried and tested it a number of times today and it was great and the problem didn't reoccur after multiple open and closes. I was just unlucky that my power latching failed to "unlatch" the first time I tried it.