mine is drilled 4 1/2" pin to pap above fingers, no weight hole.
so far on the patterns i've bowled on, it has been easier length thru the fronts, not a heavy midlane but a solid midlane read with a continuous, non-violent move off the breakpoint. great medium ball that is very tweakable.
so far i've only been making cover adjustments to tweak reaction. i may eventually have a weight put in to increase more midlane reaction.
the pearl is similar, just longer & stronger when volume decreases.
great pieces!