Today I stayed sick home, but couldn’t sit still, so did a few things…..
Checked out the last missing diagonal now I know where the control tube of the aileron go’s “into” the fuselage. You can see that the end is going to be bend and fit nicely in between the two tubes that are already there. This diagonal only just misses the control tube of the aileron. This is exactly what I wanted, as this way I can rivet a gusset plate to it with a hole, so the fabric can be fixed with glue around the tube controlling the aileron.
I will make the diagonal on the other side identical for obvious reasons 🙂