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Lat64 Opto Bolt- I have been throwing the pre-release Bolt in Opto plastic since the Worlds in Santa Cruz. This disc is about as opposite from the GL plastic as you can possibly get. The overstablity is about on par with a Champ Boss in a speed 12+ disc. It has a shallow rim similiar to a Havoc, but not quite as fast. A definate headwind beater, love it. We'll see if the production runs end up as stable.
The slanted rim of the Roc + really gives you feel of throwing a driver. Depending on the shot, this can work to your advantage. You just can't bury you fingers under and expect to get the same pull as a regular Roc, it's just not designed that way. If you keep these things in mind, the Roc is a great disc, and the XG material is way cool.