I hadent really thought about it before putting in the order. I don't think I'm going to cancel as I feel the positives of they system outweigh the negatives as I see it.

As far as them coming loose I haven't heard of one coming off and according to KAC they are tourqed at 50 pounds and they add a bit of rockset so I'd think it's on as good as a BCM gas block with set screws would be.