@lia I was in contact with them by @ but since a few days it seems as if the contact has broken off, I will remind myself today ;) on their discord I also posted this topic, for now not too many hints https://discord.com/channels/731226901867266149/1064595548641964072. I handled it as gently as possible. The LEDs came to me not in a nice box like on the website, but rolled together in a protective film, the package was also missing a bag with thermo paste and a cloth. I don't know was it shipped like this, or was it repacked somewhere along the way. I do not have much possibility to resolder it.