Ok. Probably lost the OP long ago but to the current discussion, the WBO2 operation depends on more than just the O2 present. At least that's my understanding.
Linked to this recently but I think it was in a thread that went off the rails and got deleted. http://web.archive.org/web/20211207...rtsvillage.com/forum/viewtopic.php?f=6&t=9920