I am upgrading from my 65.5" 2011 syndicate a2 right now. Tried a 67" 2016 vapor lithium and immediately ran a pb (all six balls at 36mph, 15off). Based on weight guidelines, I should ride a 66" (145lbs). I haven't been able to find any 66" lithums used, but I have found some 67"ers. The only reason I am tentative to buy the 67 are the weight guidelines. Does anyone have any thoughts on this?