I drilled a quantum Raven for a guy that absolutely loves it and wants me to drill every quantum that has that same core but with different coverstocks and same drilling.  I know there is a the quantum Fire that has the same core, but are there other quantums with that same core also?  I know I saw the purple one, but I think it has a different core.  Any help would be appreciated.
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Shane Soule

http://www.bowlingballreviews.com/search.asp?isCurrent=0&companyID=43

Most all of the cores have the same shape (mushroom), but it appears if the densities were tweaked slightly to give a little higher/low Rg and Delta-Rg.  Another ball you may want to look into which uses the mushroom shape core and a different coverstock is the Neo-Tac Khameleon.  Probably one of the best overall balls I have ever thrown...  

The issue you run into now is trying to find all of these, as they have been discontinued (with the exception of a few remakes) for quite some time and have all but dried up!

Good luck!

S^2
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-Strapper Squared

Picked up Sam Adams and now just need to sign LaVaar... Watch out AFC!

Does the quantum elite have the mushroom core?  I can't find a picture of it anywhere???
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Shane Soule

Monster Bruiser has the same core and is a awesome ball.