Fred really did battle with Nozaki and Lemke over what he perceived the value and classification that should be accorded to Blackless. Although I collected the set because Lemke did list it in SCD, I do not think they are variations.
Nozaki is involved in a project to update the Gilkeson variations publications. Here is the link to that effort in another thread. You may be able to contact Nozaki through that site. Also, in looking I have kept various treatises I received from Fred over the years on Blackless, Blueless, Autloless, Blacklessing. If you want to pm me a mailing address I can send you copies ( too much to scan and post)
https://www.net54baseball.com/showthread.php?t=277792