No. Honestly haven't. We changed from JD to NH in 2011. Had medium range clutch packs go on power command gearbox on a 7050. That's been biggest problem. Got a t7 200 2015 with 6k hours, t7 190 we bought this year. Sold 7050 with about 8k hours if I remember correctly.John Deere brakes seem ok on 50k as long as the trailers are maintained.
Have you had any problems on your New NH?