Very informative post GPS. Thanks.
Here is the lates pic of the 2nd DWC. It is rolling along smoothly with no issues and well ahead of the soil based timeline.
Still not sure of what varieties as this came in a "mix" of at least 7 types. I was able to distinguish 5 and get them into the system.
So far so good. DWC is so maintenance free and easy with lettuce! I see no reason to grow lettuce in any other type of system. That is barring a raft or NFT in a commercial sized setting, but this is basement produce!