AW, seeing your first post item of:
6) Total internal resistance is < 30mOhm ( according to data sheets of components ).
Do you know if that is the total resistance of that entire driver (vs. adding resistance of PCB components) so people can figure out how much the voltage drop would be in protecting the bulb? I was trying to get an idea comparing this setup to a stock mag switch with FM's bipin bulb holder which came up in this post. I believe that stock setup has 180-200mOhms. If you are not sure, I can test the two setups with same bulb and batteries to see what voltage drop I get.