I ordered these flashlights from DX DealExtreme: $4.89 Compact 9 LEDs Flashlight 2 PACKS And they would make a great magnum mod only problem is getting the PCB out without damaging the threads. In the pic shown the red arrow points to a plate that holds the PCB up to the front. And the green marking are these notches that I put my utility knife in to turn it. Me using the knife has damaged the threads and I can no longer screw the head on to the body. You can't punch out the PCB as shown in madog's video as there is a bevel at the end, I also tried to punch it out from the lens end and that didn't work at all. Now I'm just trying to figure out how to get the PCB out and possibly use the PCB with a different mod. Fortunately I bought the 2 pack so I have one torch that is undamaged. Just a word of warning to those who want to make a magnum that these flashlights although cheap, they are a little hard to work with. At least for me 