Brick,
The Extra was a light load of particles on a Super-Flex base. It was probably Columbia's TEC2 coverstock. The core had a slight mass bias which adds to the potential backend, making the RG differential appear greater than the specs indicate. (One has to identify the ball you want to copy.)
So these days, I'd suspect some of the particle pearls, like DynoThane's Vendetta Particle Pearl, Storm's Depth Charge, and stronger resin pearls, like Storm's Triple X Factor, as well as some of the newer very strong resin solids, like the Bully and the Rule, (when polished lightly), MIGHT give you similar looks to the Extra.
One has to translate the Extra's performance, how you had it drilled, what changes you made to the surface and apply those to the time when you bought it and used it. Then apply those parameters to today's balls AND today's oil patterns AND amounts.
Actually I wonder if Track's Havoc (same core as the Extra) might be applicable to your search. I am not sure if Del Warren had something to do with the AMF Evolution Extra's design at that time, the year 2000. The Havoc's cover is resin solid (possibly enhanced Super-FLex, bringing it closer to the Veer particle on the Extra). The right surface prep on the Havoc might bring it close to the Extra.
Why not discuss this with Excaliber and tenpinspro, the Track experts?
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"We get old too fast, and too late, smart."
Edited on 8/30/2004 8:21 AM