I am looking to buy a new 2015 or 2016 XP4 1000. Has anyone confirmed that polaris has fixed the front end noise that 2014 and 2015 owners were experiencing? Also what about the roller cage in the front diff, did they go back to an aluminum one or is it still plastic? If these issues were fixed it would make sense to go with a 2016 but if no changes were made I will save the money and get a 2015.