Today no big visual progress, in spite of the three hours in the workshop.
I didn't like the way the air vents where bolted on the rear support, a piece of angle riveted to the fuselage side skin. With my non standard vents, getting the nuts on would have been difficult, so I decided to redo the angle with some thicker material and install platenuts.
Here is the result, with two platenuts on the angle, and one on the bracket.