Neat had not heard of this thanks for sharing. Sounds like its much the same safe for free but maybe not as easy to mix and match drives. I had a bunch of random ones leftover from this and that.
That being said if I ever have money for a full build I’ll probably try TrueNAS.
IIRC a trick you can do is take a heat gun (or failing that a hair dryer) and warm up the magnet gasket border thing. Then close the door and leave it for a bit. Something about it better forming to the correct shape and making a better and more consistent seal.
Couldn’t hurt!