While the number of cores in general MAY be limited, the materials they use and densities they use in each piece can be interchanged. By simply changing the density, you can get a totally different reaction. Not to mention, they could use 1 core and 1 type of cover (such as GOO) for the entire year, but a dull reactive cover, pearl reactive cover, dull particle, and a pearl particle and have their 4 intros for the year. Although Track would not do this, it is my way of showing there are so many possibilities out there for core and cover combos, not to mention tweaking the core, that the possibilities are endless.
On a side note, Del is the kind of guy who wants to be a leader, not a follower. Del strives to make every advancement possible, along with the rest of the guys helping to design the cores and new bowling balls. While it may be feasible for Del to sit idly by for a few years or more and just reproduce old cores with different covers, it would never happen. Del nor Chuck nor Alex nor Brian would even think that way, let alone let it happen. That is why you see the tweaking of the core everytime a new ball comes out. It just isn't the same core with a pearl cover instead of a dull cover, you have different pieces in each core to give that ball a specific reaction.
Track is BY FAR in my book as the most innovative company today. They keep their product fresh and each release is bigger and better, as all the hype on this board from the GP2 is getting.
Just my 2 cents
Clint
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Clint Daley-Owner
Lets Go Bowling Daley
Salem, Ohio 44460
TRACK ADVISORY PRO SHOP STAFF