[QUOTE=fatbikeGM;22565839]Apparently I can not even _quote_ URLs before 10 posts …
So I‘ll rephrase my reply since the original text was lost:
Please use Loctite with whatever adapter you buy. Both the H&H adapter and the Brompton luggage block came with Loctite blue.[/QUOTE

The adapters have tiny set screws that are used to lock in the top (tension) bolts by screwing them down on the threads of the tension bolts. I think that even if the set screws were to back out, that having used them, the threads of the tension bolts would be damaged and will resist being unscrewed. They also supply a loctite type liquid.