Also, you don't necessarly need to Reflash the Image with a new SSD (but still the safer option).
I just made an image with dd and saved it on a usb Drive.
Restored the image on the new SSD, while it was plugged onto my main pc, and just swapped the SSD on the deck.
I was suprised the deck automatically expanded the main partition to fill up the entire space.
yeah, those were the days I got into Linux gaming and I was dual booting with steam games on ntfs partition. Pain, only pain