Who cares what the elevation was... It shows you taking 75 lbs off the new chassis is extreme. The old turbo could not even keep up with the new 800 and thats saying something tell you that right now, cause the old z1 turbo is fast as ****....
Well 75 pounds is a bunch. But as others from other makers have already found out....sometimes those pounds come out from structural support that means a bent tunnel.
You have to ask yourself a few questions.
First, what are you going to do with the sled? Hole shots, important enough to possibly give away some strength...all to shave a millisecond or two off the get up and go time?
We already know that the pre-2012 sleds are rocketship sleds. How much you really need?
Put this way....if the lighter sleds start showing fatique faster, was it worth the weight loss? Maybe the lighter sled isn't quite as important as the need for structural strength?? Don't know...maybe it is just me...but the jury is out on this and won't be known for a period of good ole fashioned..."sell the sleds and see what happens" type of research time.
Having said all this, I would not hesitate to buy one....because I already know how much fun they are.