HI, I currently have a 2008 JD4105 , originally was looking for a Kubota but this came along (8 yrs. ago) would like a set up like a MX54000/5200/4800, want heavier FEL lifting capacity mainly. My question or concern mainly is with the Tier 4 emissions engines , has this been an issue for any of you guys? any concerns about future issues or cost related to this systems, especially sensors related electronics and such? otherwise I need to rethink this and go back in time instead of forward , I looked on issues with the new emission requirements and never came up with that much , so can't be to bad, just no idling and short start/stops. Any input greatly appreciated. Thanks