Still on page 11-03; instructions are a bit confusing. Enough to have some doubts about which holes to countersink and those to be left alone.
Besides, I had to figure out how to countersink the spar to accept the wing skins into the row of holes having nutplates. I think that I’ve came to the right technique until I realized that the instruction to undertake that kind of task is somewhat clearly written on step 5 and 6... (sigh). So all those nice tests nutplates/shaver combination that I’ve determined is kind of useless. At least this work had made me perhaps more proficient in the countersinking technique.
Now, I’ll have to try out the manual’s technique just to be sure that the outcome is as expected.