I have used an ncode nsix-one 95 18x20 for the last 4 months too, after having played with a Prince OS for the three previous years and many other Prince OS racquets in the preceeding years. I have only strung the nsix with multifiliment strings like Klipper Zyex and Prince Primer Softflex in the 54-59lb range since I've owned it.
My $.02: I agree with the original poster that, despite what the specs say, the racquet can be hard on your arm and elbow, at least that has been my experience. I'm 47, have played tennis for the last 30+ years, and have NEVER had even the slightest hint of TE. I buy the nsix-one 95 and after a couple of months I start to experience TE symptoms for the first time in my life. You do the math.
I love how the racquet plays though. It is great for serving and volleying in particular, but plays at least as well as my old racquets from the baseline. It does start to feel a bit heavy at the end of a 3-setter, and I have tried to compensate by doing arm and grip exercises which have helped. I'm going to keep the racquet for a while longer since I've never played better tennis, but I don't like the fact that I must rest my arm at least a day before playing again, which I've never had to do in the past. YMMV.