Dril as you would any pancake type core. While it is slightly more than a pancake, it is barely more than that. The drilling will barely make any difference. A while back, I wondered what difference the pin distance might make and whether I should treat it as a 2 piece dynamic core or as a pancake core. SO I emailed Dyno-Tahne direct; here's the answer I got:
"
... it is a pancake-type design, and it does make a small difference with a bigger pin out. The cap is round and it doesn’t make much difference in how you turn it. The differential is achieved by the depth of the cap. So, I doubt if
you would see much difference side by side.
"
The phrase, "it doesn't make much difference in how you turn it" refers to the position of the core and how you place the pin-CG line. It does have a larger pancake core than a standard pancake core and that adds to the potential flare, as it has a larger RG differential than the standard pancake core (like in an Ebonite Tornado Warning). SInce your pin-CG distance is so short, you'll get even less flare and it will be even better for dry lanes.
So, bottom line, place pin and CG stacked in the middle of the grip. Polishing it will add length as needed.
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