1) Re-mark the Standard Brightness point on the meter.
2) Reduce the series resistor in the meter housing.
I have done 2), replacing the fixed resistor with a pot.
And here it is.
The only problem with this is finding a standard light source to calibrate against. Calibration using test negatives is possible and would be fine for photographic applications of the SEI, but as it has a Foot Lambert scale it is nice to calibrate to that.
Standard Light Source.
(under construction in both senses, keep tuned to this station)