Yes!...... Went to the hangar yesterday and measured right where your elbow would be on the armrest and measured out from the side skin 1 1/2 " and marked it. Drew a line from the front outer edge to the line that I marked and to F605. Came in from the F605 bulkhead 1 1/2" and drew a line form there to the inside corner of the armrest and the F605.
Got out my snips and now I have some elbow room. I increased the width from armrest to armrest by 3". I am going out right now to rivet a new angle edge on and then decide what to do next. Whatever I do from here on, it will be an easy mod, and easy to alter later on. That big armrest was always a waste of space.........