My weight trolley binds up bad, even after lubing the rails generously. 180lbs feels like lat pulling 300. The seat is low for a 6 ft person and the thigh pad is way too small, it should be at least 6in or so wider. If you want to use the row cable, ensure you bolt the the machine to the concrete floor first because the back does want to lift up. Some recommendations to add for a v3 model, use linear bearings vice bushings in the weight trolley. Put the rails in the middle of the machine, front to back and run the square tubing down the back, that way everything is braced and squared in. Right now you have rails as a back support and are flexing under any decent load.