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Just bought 01 Summit 800 High Mark "Extreme Traction". Crate engine, came with a 151 track and now has a 156" track, rails, and tunnel extension and a 16" Camoplast track. I am told that it also has an Arctic Cat "jack shaft"...It is easy to see that a lot $$ was spent on this sled...My questions are, What does the the "Extreme Traction" mean and why would a Arctic Cat "jack shaft" be used? Thanks in advance!