My sled is a 2010 MTX SE just like Christopher's. The only real performance update on it is a 162" x 2.5" CE track. It has the stock Float rear skid and the stock skis on it. It does have our handlebar relocation kit and a 1" taller riser with a flat plate to t-post adapter made by North Coast Innovation. More information can be found here on that:
http://www.northcoastinnovation.com/
When I left my sled, it had 75 psi in the front Evol-R shocks, 65 psi in the center shock and 150 psi in the rear. I am not 100% sure that this is how it was the day that Christopher rode it however.
There are no engine mods whatsoever on the sled. The clutching however, is not stock.
Christopher states that the sled is easier to roll over in his review. I agree with that 100% and I'd like to expand on that to say that when you do roll the sled over for any given maneuver, it does so at a much more predictable and controlled rate. The sled seems to have lost that "high point" where it will, almost uncontrollably, flop right over on its side. I hope this makes sense.
Off camber and downhill turning are also dramatically improved. The sled did not want to "fall off the hill" anymore. It went where I wanted it to go with much more precision and predictability.
And as stated, the sleds trail manners for a 162" sled with a 39" front end, stock skis and no sway bar, were very predictable and easy to ride at speeds of up to 70 mph or so.
Scott