Good tuning article Mike6975 .
Albeit you need some skill to be trying this stuff , or send it somebody that knows what they are doing , like RIFLE or Flint
Plus you need some good tools and a great eye .
I wouldn't ( I don't ) harden my hand like he or she does either , I would ( do ) use oil to quench that heat . I feel it wears on the already too soft cylinder as it is , cold hard is too hard in my opinion .
Thanks for posting the stuff though , good info and good tech tips there .
Alabama