The new Switch Blade works for me. In med/dry conditions. It clears the heads with ease, and rolls into the pocket very smoothly and with alot of carry, and it's forgiving when I came in too heavy, still knocks the pins around for a strike 80% of time and if it does leave a split it's usually a makeable one!!!
Haven't tried a Diesel yet so I can't give a comparison.....
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"To bowl or not to bowl that is the question"