Great work. Congratulations.
At that concentration of NaBr after the wash, at 10 deg C (a good wash temp), the vAg would be about +37 and at 40 deg C (a good coating temp) it would be about +67 mv. This is a very good position for the final emulsion. I often aim for about +50 mv.
How did you sensitize it with hypo (time and temp)? I use about 100 mg/mole of Sodium Thiosulfate Pentahydrate for 60 minutes at 60 degrees C. This would give you more fog but also more speed. Also, Erythrosine can cause speed losses if used at too high of a concentration so it must be "just right".
The corona treatment sounds as if it is just about near perfection now. Thats wonderful.