If you have a spair, and dont mind giving the guys and zoke a call, go for it. I honestly dont know if mine has a slight twist, as my shop put it on after they ordered it for me. I bought it intending to run it at 155mm or so most of the time, but 170mm is just too sweet.
Not the best for climbing, the head angle is at a hair under 68 degrees , but the descents are so amazing it doesnt really bother me. I think ill run 170mm more often than I reduce the travel. It will be nice if I know I have a day of climbing and lighter XC type riding to be able to drop it down and get a more responsive head angle, but I really almost dont notice the difference. I have it setup really plush right now so with the sag the angle is even closer to what I had with the 36. I find it matches the enduro better. The rear end on these bikes feel like alot more than 6 inches, and the 170mm seems to give it a more ballanced feel, before it felt like the front was way less plush than the rear. I have used about 6 full inches of travel and havent hit anything too huge so im expecting to get the extra few mm on big hits. Over all I cannot get over how sick this thing is. And for an air fork its is super liner with no par pressure too which makes it feel like its coil packin brothers. I am just so stoked with it right now.
Thanks for the compliments on the bike. I just bought it a few months ago, and my next upgrades are an 8in rear rotor, and a shorter stem for DH/FR. This is my only bike, and to be able to run the lift acces trails not too far behind the Demo's is going to be sick, and its still light enough (35.6lbs right now) to be set up for fun XC or average trail riding, and it still climbs like a goat, what more can you ask for?