Marked out the position of the pitot/AOA hose grommet holes in ribs 1 & 12 then drilled them & the holes in ribs 2- 6 to 14mm dia. I have made a very slight deviation from the plans in that I have riveted the aileron pushrod guide from the guide side of the rib. This is so that in the future, if replacement of the nylon guide is required, I can access the rivet heads from the inspection panel in the lower skin adjacent to that rib. P.S. DON'T DO THIS, the plans are correct!!!
