Cryogenically treated rotors

[Daniel Husseu <GY3WSX@VM.SC.EDU>]

   Hey y'all.

   I was reading up on Cryogenically tempered rotors in the last issue of
Quattro Quarterly, but it seemed like more of an ad than anything.  I dunno.
This is the first time I have heard anything about them.  Has anyone used them,
or can anyone tell me thier advantages, and disadvantages (if any)?  I'd
appreciate it.  I now know what they are, but still not sure whether they are
practical or usefull for street use.

   Later,
   Dan