So just a quick update from my Sintech short black NVME / Samsung 970EVO 2TB upgrade a while ago. Initially everything went fine, but after the last Firmware Update to 194.000.000 of my MacBook Pro 11,4 I got kernel panics after rebooting the trusty Mac. Turns out I inserted the SSD and adapter too deep or slightly maladjusted in the slot. After numerous retries everything is back to normal now... Hope this info might be of help to some of you. cheers.