The ball doesn't have to have a marked MB, but a symetrical
won't do you any good.
I have a Charcoal Executioner, drilled lable leverage, and one
drilled 315 pin in the leverage position. The ball dosen't
have a marked MB but there is one there as the neck of the core
is tilted.
To think about the cores the two are just about 180 from each other.
The 315 gives the ball the feel of a higher RG ball (for mae at least).
You can feel the shift in weight due to the moving the neck of the core.
I am still playing with the ball, but I do get the hard arc, almost like
a hockey stick that is rounded instead of the sharp break. You get the length,
but the violent skid snap on the ball, and I even have the ball polished to
1000.
They say the drilling alows for release mistakes. I am still playing with that
too, trying to force mistakes.
I don't really think the driling is for the stand left throw right bowler.
I haven't tried that release, but I will.
Last night I took it and was playing straight down 10. The ball would arc in
and would finish light. I think this is more because it was first game, fresh lanes, and 1000 polish. I was playing right on the edge of the oil. Mid 1st game, it was moving a little more. I kept moving left and it was holding the line until the heads broke down.
All in all, it is an interesting drilling to play with.
My only advice is if you are going to try to do a comparison,
I think you need the same ball drilled you regular way.
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Eric T. Spivey, P.E.
Visionary Test Staff Member