both fox and lynx can partially be upgraded to puma 4th generation controls.Push Pull Pedals, Collective arm including zone switch throttle box, and Curved Cyclic can all be ordered from our store under the partial control set category.it is highly recommended to upgrade to our latest USB PCB board, if your controls don't have the newest revision.send us a contact request along with your serial number if you are not sure about your USB PCB Version.