i have a jump break cue that i need to remove some weight from. the cue has no weight bolt in it, although it is drilled and tapped for one. the weight bolt hole is about 5" deep and is for a 1/2x12 bolt. there is something metal in the end of the hole. the cue is currently 19.4oz and i would like it at least 18.5, 18 would be even better. the butt is made from bird's eye maple. is it possible to remove this much weight? i assume that it would require coring out the butt? would i lose the ability to change the weight with a weight bolt? how much would something like this cost?