I have a BHP drilled 6 X 5.5. For me, it is a very condition specific light oil ball, not true dry. It still needs a touch of head oil to get down the lane, but it must have dry boards to make its move. Too dry up front and it craps out before it gets to the pocket. Leave it in the bag if there is any hint of carrydown. I've considered redrilling it a bit stronger, but it feels so right when it matches up that I've been hesitant to mess with it.
I recently picked up a used SonicX, and it's being plugged and redrilled right now. I probably wont get a chance to throw it until the weekend, but I'll check back once I do.