I received a call back from BC yesterday having left them an email bringing the above post and video to their attention. The chap (I missed his name as I was in a busy cafe when I answered) assured me that they’d never had any other complaints regarding the kits despite selling “thousands of them all over the world”.
He said that they’d heard from Martin at Deltaparts regarding his concerns over the safety of the kit and that, when they offered to take the kit back and send it to the factory for testing, he declined the offer as he was “taking the car on a track day”…
I’ve since collected my car with the kit fitted and can assure you that, at 5 clicks from hard at the rear, they most definitely DO NOT BOUNCE like the video. I’ve yet to try them on the softer settings but will be attempting to do so tonight and will report on the findings.