Now that may sound like a silly question, until you try and answer it within MIR.
Is the front looking at the keys or is it sideways on looking into the open lid.
A piano is generally facing the audience sideways on the stage, so if you turn the piano 90 degrees in MIR to reflect that, then set the width to 2.75m (that's how long a 9ft grand piano is), but the width stretch goes the wrong way in MIR then, we need it wide across the stage, not towards the back wall. So you have to keep the piano zero degrees so the width widens it in the right plain - but that is not the direction the piano should be facing.
At present I am assuming that the CLOSE mic is facing the open lid (sideways on), and PLAYER is facing the keys - but which way around was the piano with the DISTANT position?