He organized that run to start, then handed it off to Sebring to grow. Also, it looks like it was a grow of F1s to make F2s. Not sure it’s not him, but I can’t find any reference to him growing SSDD or even talking about it after a few posts at the beginning of that run.
This could be a possibility. He also posted a picture of F4 seeds with a pile of F3 seeds elsewhere. @Herbie, did you make SSDD F3s and is there a chance these could be from you? Credit where credit’s due, after all. 