Cheryl_C_Crane's post in Exterior Keystone & Soldier Course Trim For Windows In Brick Walls was marked as the answer
Robert & Perry, Thank you so very much! I will definitely use both ideas. Perry's for most windows and especially for the sills on these. I'l save a symbol in Millworks so that the keystone and diagonal brick can be more integral to the window. I knew that there was a better way, and that I was wrong headed.