Yeah, if you are concerned about temp stability you should look at TAC, as Yondering said. It is a spherical also.
As to the 63 Sierra, ask Ingwe for a testimonial.
'Four legs good, two legs baaaad."
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"Jimmy, some of it's magic,
Some of it's tragic,
But I had a good life all the way."
(Jimmy Buffett)
SotG
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