Cont'd Dimple on RH skin top and bottom (still Step 1).
Step 4: Machine countersunk holes in Front Spar to accept dimpled skins.
Referencing Section 5 re: dimpled skins over surfaces to be countersunk -- the CS needs to be .007" deeper than normal to account for the dimpled skin. I adjusted Micro Stop CS tool using test piece same .025" thick as skin with dimple to insure no gap at the skin to spar surface. This required about 2 more "click's" to .009" extra overall. I was tipped off about the extra depth needed per discussion today with Mike Lauritsen of Cleaveland Tools. While I was investigating & ordering some special tools needed for Elevator build in Sect 9 coming soon, he noted typically need .010" instead of .007" extra depth on the Micro Stop CS setting. He reminded me to use a test piece to insure correct depth. Thanks Mike for the insight !
Lots of holes along top and bottom of the spar, so takes considerable time.. Then, repeat on Rear Spar along top and bottom.