You don't need an amp opener to open amps consistently. I mean it's a nice thing to have, but not necessary. I have opened many amps and a single kleenex folded twice and then put over the top of the amp works great. Grip the lower end of the amp with the first finger curled around it with your thumb bracing the finger, and then break the top off with your thumb and forefinger like you're peeling a chip bag open.