Model T tank, version 2.0?

We were hoping, after our recent post on the Charles Martin-built Model T-based tank, that we’d find out more about what ultimately happened to Martin’s concept, but all that has yet come of that research has been this photo posted by twin6 on the H.A.M.B. of another Model T-based tank with a different wheel/tread design. We have no context to go with the photo, but from the mud spattered on the sides of the T, the “U.S. Army Ord. Dept.” license plate, the men who appear to be Army brass hearing a pitch for the tank, and the much larger tank behind the men, we can guess that this photo was taken at an Army proving grounds after running the T through its paces. Did Charles Martin revise the design of his tank to (or from) this design? Or did he have a competitor trying to pitch a similar concept?