I Just got my GH24's yesterday. All I can say is /ubbthreads/images/graemlins/wow.gif. I tried the GH24 with the following configuration: Mag 2C, MOP cammed reflector, UCL lens. I tried it using both 3xC123's and 2xPila 150A's.
If there was any difference between the Pilas and the C123's, it was not descernable to my naked eye by the time I changed battery setups. Maybe a side by side comparison would show a difference. After 15 minutes of operation the C123's (drawing 1.7A) became very warm/hot. The Pilas (drawing 1.8A) remained at ambient temperature.
I don't think the C123's like the high current draw, but the Pilas seem fine with it.
A side by side visual comparison with an Ultra Stinger, showed the Ultra Stinger a slight winner in throw, but the GH24 was the definite winner in light output. The GH24 had a wider stronger beam, and better side spill than the Ultra Stinger.
Short of finding a reflector better suited to the GH24 (maybe an SMO or LOP) to give more throw, I think this is the ideal simple (no skill required) Mag 2C/2D mod.
As always, the quest for more lumens and throw continues.