Aligning the 90 degree inner rear ribs wa sa b it of a challenge since they had to be aligned in plane with all other rear ribs and 90 degrees to the rear channel. I got everything set-up as seen in image one, then clamped both 90 degree inner rear ribs (there are also two angled ribs as seen in image 2) in place before drilling and clecoeing. The angled ribs were fairly easy once both 90 degree ribs were installed. I am glad that i double checked clearances and measurements before drilling though. Because the balance bar is offset from the center line, it keeps messing me up and I measure distances from the wrong spot on the rear channel. I did catch it though and made the proper adjustments before drilling. The angle of the two inner most rear ribs is set by the cut in the rear skin that will be made later.
