This is rather unprecedented in the annals of Kantner Trace—2 posts in one day!
I have uncovered some interesting info that helps but does not solve the mystery of Martha McKibben, who was the source of such consternation in my last post. Let's see if I can boil it all down for you. Perhaps you can take what I've learned and connect the dots that are eluding me.

1. I believe I found the marriage record of Elex McKiben and Martha:
    William A. McKibben mar. 3/31/1876 to Martha J. Kentner in Kosciusko Co, IN
But if you are paying attention, you will be objecting. And I don't blame you. But I arrived at this conclusion via a round-a-bout route—I wanted to use "circuitis" but my spell checker isn't giving me the proper spelling, it just keeps slapping my fingers—but oh well.
Here goes:
I found a birth record for a James McKibbin, b. 9/13/1881, Union Twp, Auglaize Co, OH to an Alexander McKibbin and Jane Kantner. Then I found a marriage record for a James H. McKibbin and Maude Duncan in Kosciusko Co, IN. Marriage on 11/21/1906. The important thing is that the marriage certificate also states that James was born on 9/13/1881 in Wapakoneta, OH to William A. McKibbin and Martha J. Gagley. Study that for a while and I think you will see why I have drawn the conclusion that the Marriage Record of William McKibben and Martha Kentner, set forth above is the correct marriage record for the Elex McKiben and Martha (somehow related to Elizabeth Gagley) in Martin Kantner's Will.

Further findings after I return from "OZ, the Great and Powerful"