I am trying to understand the countersinck & rivet schema for the "Rear wing spar". For the W-907E Rear spar doubler plate I noticed this picture on a builder website:
But based on the plans it looks like that the second row on the right also need to be rivetted, isn't it?
If you appear to have detailed pictures from these rear spar countersinck and rivet setup, kindly share them with me. thanks!