So far, I'm very happy with my new APDC+. It's smooth, rock solid, and the tension mechanism is so easy to use I don't really see the need for a crank. The only issue I have at this point is the tension accuracy. I've been tracking tension on my racquets with the RacquetTune app, and my machine seems to be at least 8-10 pounds higher than other machines, and my subjective evaluation confirms this. To add to the confusion, I bought the Alpha Tension Calibrator with the machine and it actually says my machine is 1-2 pounds low when I test it at 50 and 60 pounds. The other places that strung my racquets include 2 internet retailers (including TW) and a friend's machine. I suspect the internet retailers were fairly accurate, while my friend's machine was probably too loose. I suspect that one reason could be constant pull vs. lockout, but setting the machine to 52 to get 60-62 pounds seems to be abnormal. Has anyone else had a similar experience? Is the difference between constant pull and lockout really that much?