Jim, I only got a quick glance at the burner, but I think you might need to adjust where your jet is, looks to be glowing red.
Only the ceramic Nick.
Have you got little blue cones above the ceramic? I’ll be honest, I don’t know a lot about them 
Little blue cones is what to aim for, on a boiler that big with a small BIX I like the ceramic to glow. The brass jet area stays relatively cool to the touch.