UR Crank Pulley?

[WrathOfAZSI]

Was reading about the prototype UR Crank Pulley on Import Tuner's Site, the article with the EP3 Weight Reductions. Has anyone ever used a lightened crank pulley on a previous car? I would think it'd screw up the rotational inertia of the crank, but is this risk worth the extra horsepower? Going from five pounds to 3/4 a pound seems a little extreme to me...

[HATCHirokuSi]

i had the ur ss pulleys on a 2002 v6 accord, it was a 3 pulley set, crank, alt and something else i forgot and my car worked fine wit it and the gains were the best out of headers, intake and exhaust, it was a great mod for the 02 v6 accord engine.