Appreciate it. I will see if my work has an official chart. By smaller I’m assuming you mean the elements within are smaller? Or just higher resolution?I could loan you my USAF resolution chart it is much much smaller than your homemade chart
Also after testing some spotting scopes I found the tripod is definitely a viable. Next time I'll use two of the same for side by side comparisons.
You can also rent optics if there's a high end model you can't beg borrow or steal for your comparison weekend.
At that distance, at least with my chart, it still makes for good comparison. It’s obvious which can be seen I mean.