Hartmut,
I installed a pair last night. I think that you will like them-- they are very sturdy, and definitely seem failsafe. I spent some time fiddling with them, and they have a very satisfying click when they seat.
One thing, though-- I would not suggest installing them with the screws that they come with (they are substandard). Install them with the Alembic screws (like everything Alembic, they're over-spec'd). You will need to trim some of the head to make them fit, but well worth the hassle.
I did mine with a disc sander attached to my drill. Took just a couple of minutes.
If I remember, I'll try to post some pictures of them installed on the Epic.