I transferred the capital letter by tracing it on to some tracing paper, then covering the back with pencil, flipping it over and tracing it back. That left a faint image on my graph paper, which I copied again, changing the shape of the letter just slightly. The emblazon I transferred to my graph paper layout using a light box. It was easier to get the spacing for the letter using graph paper. And then easier to use the light box to transfer the arms. Then I free-handed a fencing helm and mantling above the shield, based on a drawing I found online.
I had sketched in a squiggly line from the helm to the letter, but looking back at my examples, it didn’t really fit (and the squiggly line across the top is probably going to be changed.