After I posted my earlier design, I did some testing and although it worked, I realized that there needed to be some support for the hex wrench to make it even easier to use.  I made the tool thicker for vertical support and added some raised areas for the wrench to rest upon to add horizontal stability to the wrench.  After testing this version I realized that it would benefit from a smoother top surface that the wrench rubs upon.  I included a g-code file without ironing, and one that has ironing on the top of the areas the wrench rubs on.  With this version, I was easily able to get the print bed better trammed than I have ever had.  The Bed Visualizer graph is all green now, with a 0.05 variance.  

I have included the FreeCAD file but be warned that because of all the text, it is very slow to refresh.  I have not tested it for robustness, so making changes can easily break it.