With my PBG Ash TL, I ended up doing quite a significant "swimming pool" route in front of the bridge position right up into the neck pickup route.
This was all about weight relief. The body was HEAVY... I lost roughly a 1/2 pound (>200g) which is actually quite significant in guitar terms.
I think I finished up at 3.7kg (8 lbs) which isn't too bad, at least manageable.