It seems to be a combination of 32 inch and 33 inch vara lengths. I can't get a spot to work out perfect with the tape measure, it's kind of a circle 2-2.5 feet across where everthing comes together. I kinda wanted a tape measured spot to work out perfectly on a spot about the size of an apple pie and not a costco one. It is on a hillside and the markers are from about 104 feet on in near 50 feet for the most part and then there's an inline one at about 34.6 feet and then a couple at about 16 and 10. 39 varas (32") at 111/291 degrees on oldest permanent marker, 22 varas (33") at 330/150 degrees on a newer type "stacked" marker. Many others. Doesn't really confirm anything for me. So the hole is going to get a little bigger until I figure something else out.
There's two sets of "turnoff " boulder alignments, where you turn 30 degress off the marker set to the spot, which I found interesting. Off the old 111 degree marker from cross spot is a boulder set at 321/141 degrees. You turn off the two aligned boulders 30 degrees to the left at 111/291 and it goes to the cross spot.. On another big set of boulders in the wash, they are aligned towards some other markers, at 232.5 degrees. So you turn to left off that set 30 degrees, and you go out the 202.5/22.5 line to the cross spot, and beyond the cross spot is 2 other good markers coming in on same line, which is a half quad from an old mariners' compass. Turning Left off a marker set a certain angle might be a repeatable thing to know as well.