Hey Slick,
Based on what you just mentioned, the same layout should work fine. The Purple Fuze by nature is a little bit of a skid/flip reacting ball. So the Threat being lite particle, will naturally want to roll sooner and this pattern will assist in that ball reaction also. I had mine drilled similar and it did exactly that, it still cleared the heads well and had a very smooth continuous arcing motion in the back. Hope this helps..and good luck with your new Track ball!! (Mr Track gets the cigar, he said it 1st)
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Rick Leong
Ten Pins Pro Shop
Track Pro Shop Staff
Vise Grip Staff