I can attest to the difficulty in opening an original CMG infinity:sick2:. I tried a mod because the original LED got dimmer, to the point of being useless as a light. I tried picking, boiling, and heating with a propane torch to loosen the driver to no avail. Finally I used a punch & hammer to break the led and drive out the board. My mod consisted of using a driver from a Arc AAA clone with a JELED 5mm led and potting it on the original board. The original CMG PC board cleared of components was reused for the nice battery contact and correct sizing to fit the head. Now it back in service with more output than the stock Infinity. Sure its not cost effective, but I liked the form factor of the CMG and its a learning experience. BTW the ARC AAA clone's driver/led is very easy to remove, its just crimped into place.