Dan nails it. I've got a couple of strong balls drilled weak and this thread interrupted me from what I had been doing, which was kicking my *** all around the room for not doing this sooner.
Drill a strong ball (particularly strong cover) weak, and what you get is the drilling will allow the cover to push through the fronts, but once it finally starts to read it makes a strong CONTROLLED move to the pocket. The "controlled" part is the key there. You don't have to polish it up, either -- in fact, that might be a little counter-productive sometimes, because that might make it too flippy when it reads. Best thing about this is you can play around with the surface of the ball and create a wide range of breakpoint shapes.
On lanes that have puddles in the middle, this strong-drilled-weak strategy will allow you to play closer in and more direct, without worry so much about whether you're going to be able to kick out the corners once the ball comes off the spot. "Playing in the oil" is very tough for me with my average rev rate, because I leave flat leaves too often. Strong-drilled-weak fixes this to a great extent.
You'll also find you can play more conditions with that particular ball, therefore freeing up another spot in your arsenal for something that is condition-specific. I've got several balls that work great but only on a limited number of patterns, and unless I want to drag a dozen balls with me to tournaments, those balls tend to end up being left at home because they eat up valuable space. With a strong-drilled-weak ball in the bag that covers multiple conditions, I now have room to bring one of those risk/reward balls along.
As for weak-drilled-strong, what that allows me to do is get back into the track area rather than continue to move left, left, left. There's a certain point beyond which I can't go any farther left and still rev the ball enough to recover. Going weak with the ball -- or "de-shelling" -- gets me back into my comfort zone. The weak cover will clear the burned heads, then the ball takes over and finishes.
The problem with weak drilled weak is that by the time you have heads dry enough to use those balls, you also tend to have some carrydown at the breakpoint, and a weak-drilled-weak ball is horribly allergic to carrydown most of the time. So if there's any carrydown present at the breakpoint, good luck, because you will need it.
Jess
Edited on 4/23/2009 4:22 PM