I'm having problems getting an accurate measurement with my medias. They end up being shorter than what is loaded on the machine and won't cut right and sometimes print right as a result. I normally have a 52" roll on and I'm generally getting a size of 49.whatever. I've cleaned the sensor and made sure it is seated properly. I also adjusted the L and R Grip in the system parameters and that's given me a little more, but still not right. Anyone have any other ideas/suggestions?