Can anyone expound on the difference (other than price) between Flexos and Original Flexos? I've gone from Corelli (ugh! totally sleepy sounding and slow) to Spirocore which I thought was a huge step up in volume and response. Recently I've gotten advice to use Original Flexocor (accept no substitute) and also Flexocor (that the Original version is not really worth the extra bucks). And, that Flexocor is faster to respond than Spirocore. I can really use the faster response for orchestra playing, but I can't afford to sacrifice volume. For jazz, I have the latitude to adjust tone with the amp; EQ is set pretty much flat. I read the sticky about Flexocor but this question remains. What say you? Originals or the derivatives?