After missing for more than a month in the post, mine arrived and all I can say is, its crap in securing the tripod. If only F-stop gets their act and churn out enough supply for their accessories, would have been a lot better.
Are we talking about the gatekeepers? Aren't they in stock?
I've been able to order 3 sets a couple of months ago, they're pretty good at securing the tripod to my Guru.