Howdy Oroblanco,
Getting back to your topic here, whether the stones are real or not. The PSM's capture the attention of just about everyone interested in treasure. Everyone comes up with their own ideas as to what the etchings mean, and who may have made them. Some have made copies such as the late Jim Hatt, and others have made their own stones trying to show how the originals could have been made. You may recall the "Spencer Stone". While there may be others, this shows how the PSM's captivate some of us, and in my opinion this is how Travis Tumlinson's "Treasure Chest Stone" came to be.
Instead of doing all the research for you, I will share a small observation that while it may not swing you around, it may help others in reaching their own conclusions.
In my opinion, the Treasure Chest Stone, was made after the PSM's were uncovered. Garry Cundiff's comparison proves that the TCS was copied by Travis just as the Stone Crosses symbols were copied by Michael Bilbery. In my opinion the Stone Crosses, and the TCS have the same tell tale sign that has been overlooked.
You would have to be fluent in Spanish to really understand this. There are a lot of Anglo Americans who believe they know pretty good Spanish, and they can be understood despite the mistakes that they are not aware of. Most of these mistakes are made in regards to gender in the Spanish language. A Mexican idiot does not make this mistake because he is fluent in his own tongue.
The PSM's despite the bad spelling, have the gender right. Even "EL MAPA" which is an exception to the rule, is right. The Stone Crosses, and the TCS show to be "Gringo" made because of their mistakes in gender. This alone shows that the PSM's were made by a Mexican, and not by Travis.
Homar P. Olivarez