Seth the pressure switch should come with a velcro pad. I attached mine up front on the stock so i can turn it on and off with my left hand while keeping my right hand by the trigger.
Seth, I was wondering the same thing, then I got an idea. I used thin rubber bands to hold it to the stock/air tube. One on each end, so they don't activate the switch. Seems to work, and doesn't involve glue or screws. Plus, you can try different locations until you're happy. Then, when you aren't using the light, it's easily removed.
You guys that got the green flashlight, has anyone used the light without an illuminated reticle? Just curious if there's enough light, since I no longer own any scopes with lit reticles.