I think that I have gotten to the point where I have become skilled in drawing Isometrics, but I have yet to fully understand the "triangle method of drawing circles". I just plot out the square and the midpoints of each segment, skip the triangles, and then draw the isometric circle using 2 different circles. Or just find a template that matches. But I have been trying to work on my line weight to try to make it as consistent as possible. This was my first check plus and I was so happy when I found out!