1st Idea : it will great to have the real time graph in a separate window, this will be very helpfull for PID tuning process
2nd idea : it will be nice to put (I'm not sure how to formulate it but...) a "Are your sure you want to Calibrate ACC" option, warning window, when you press the CALIB.ACC button, it will avoid to re do the ACC CALIB process if you click this button by mistake.