I posted this in your other thread:
Don't do it. Do you have any idea how much wood would have to be bored out to lighten a cue 1 to 2 ounces? As a cue maker I can tell you, a lot! The only place you can bore out a finished cue is at the butt end. Once that is done, you've affected the structural integrity of the cue by hollowing it out, you've changed the balance point, and the hit and sound would likely also change.
Plus, should you choose to sell it, you're not going to get the weight bolt back in without plugging, boring, and tapping the correct threads for the weight bolt. And to top it all off, you've also voided your warrantee.
For what you paid for that Predator, you can probably get with a cue maker and start from the ground up on a cue made to your preferences.