Litho123 worked closely with Carley to completely re-design the 1499 to new specs.
This included lowering the filament height, changing the gas fill, and, for all I know, changing the composition of the filament. (Although the last I am unsure about.)
The stock 1499 works in the MiniMag with Auroralites reflector, however, you are at the VERY end of the threads to do this. I always put teflon tape on my threads to tighten them anyway, but the o-ring is right at the bottom of the head when fully focused.
Litho123's solution allows more of the threads to be engaged and is overall much more elegant. Unfortunately, I forgot to buy any when he had them for sale so I can't compare. As far as I know, I was the first to use this mod, since I had stock 1499's but not any of the Streamlight lamps that everyone else was using.
Bill