I have an Emerald to go under my Zilla. It's the perfect match, for me, another down and inner. I put the pin/pap 4 1/4 with the pin about 3 in above midline. I can use it from the middle of the second game as long as I wish. I usually start out with a med/heavy and changes to med/dry, depending on who is throwing what.
I'm usually not a huge pearl guy, except loved the Toxic, but the EV gives me just the extra skid, length, snap I need.
JMO.
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az guy aka: R & L Bowlers Pro
rlbowlerspro@cox.net