The Phaser comes apart easily with a few screws and by removing the front light bulb assembly. Save the lightbulb housing as that will hold our Blu-Ray laser! Remove the 2 AA batteries. Remove and relocate the original circuit board so it is out of the way. Remove the existing trigger button. You may have to do some cutting with the Dremel to get the switch and Blu-Ray to fit right. Install the lightbulb mount with Blu-Ray and the wiring. Attach the switch and insert the 9 volt battery. You will find the 9 volt is a very tight fit in the case. Close up the Phaser and screw it together. I drilled open the hole in the front lightbulb screwtop to accomodate the laser beam. Now enjoy your new Blu-Ray Laser Phaser! Have fun & Be Safe!