> Replacement cores are expensive.  I've read $300 or so.  

More like $142.  I bought one when I was trying to fix my leak.  Turned out
to just be the bleeder screw.  I still have t and would be willing to part 
with it if anyone is interested.

-- 
   Jerry Huff           Data General       _____     Brick
   Unix Development     RTP, NC 27709     | |_|_\      on       \/
   huff@dg-rtp.dg.com   (919)248-6277     `0---0'    Wheels    \/\/