I have a Claas Arion 550 which feels very numb and gutless on road work. I feel like a lot of modern engines it is strangled by egr and emissions garbage. Surely it has a similar engine to what has been fitted into JD pockets rockets like the 6430. What would people recomend a remap or a steinbauer tuning box? Also has anyone used Turner Tuning are they ok? Or is Derv Doctor the best