Hi Team D. I also got CRS to put on new suspension on my low mileage 2017 Caravelle just before Christmas. It handles brilliantly now but it started making weird "graunching" noises afterwards, like a spring loading up and pinging back. Steve sent me down some drop links - got those put on - and that was a lot better, but the noise was still noticeable on the nearside when turning. After 1,500 miles I took it back to my local dealer and it turns out there was some issue with the bottom suspension arm which was noisy. This came as no surprise, because the previous owner had clonked the front wheel hard at some point and I've been slowly unravelling the issues with that and getting stuff fixed. So, replace suspension arm and no more weird spring noises. But, guess what - now the other side's started up with the identical noise!! Surely both suspension arms can't be knackered? However, the noise is different to the one I think I can hear on your video.
If your frog sound started up after the shocks/springs were done, my guess is that it is somehow connected with other parts of the front suspension connected to the change. In my case, I also had to get new rubber bushes fitted on both sides when the suspension got changed, as they were on their way out, plus the new drop links. And now a lower suspension arm. So it could be that you'll need to work your way round the system to see what it is.
I do hope someone who's got better technical knowledge than me can help. But at least you know you aren't alone!
