Thanks, all for the insight.
@Zalthos said
" I haven't seen the word ABRAHADABRA anywhere in this thread."
In a roundabout way, I had it in my opening post - "the completion of the great work". I always took "Do what thou wilt..." to be a welcoming, perhaps an invitation, for all people to find and follow their own true will.
This whole topic could be something that has no rationalization.
It just struck me as odd that non-Thelemic publications from practitioners that I have read (Fortune, etc) seemed to have a huge issue with all involved with the number 11. For example, Fortune writes in "Applied Magic" about Crowley's replacing a battery of 10 knocks to 11 in formulas and comments that in doing this, the ritual becomes "an invocation of the Qliphoth" and "it is an ugly trap for the unwary student". (And then I found it more strange that in 777 it's both that and Abrahadabra)
I'm uninitiated, so no, I really am not deeply familiar with any oaths I'm just (currently) a reader and a practitioner seeking the path that sings to me.