This sounds like a good idea.

I agree with you, the std MS900 reflector leaves a lot to be desired beam-wise. To me it seems that there's a lot of light wasted at the very periphery of the beam, then a dark region between it and the center hot-spot. I'd prefer a more uniform illuminated area, with a narrower beam angle.

I was a little disappointed when I bought my second MS900 unit recently - it had the same reflector as the first. No one apparently thought to try and improve on this aspect of the headlight.