Nice looking build. Did you choose the filament to match the DeWalt? It looks good, very monochromatic. 8^)
Fwiw though, that’s probably not a great check of squareness. For one thing the framing square itself isn’t really a precision instrument. I’ve posted about my process for squaring, but there are other good approaches too. A 3-4-5 triangle works well too, if you have a good means of measuring it.