Brief Description: Completed deburr, dimple, and countersinking.
Took a fair amount of time but all parts are ready to go into alodine. The construction manual neglected to mention in Ch 26 that a couple of side ribs need to be dimpled, preferably before you install them in 26. Another builder caught it but it was too late so I had to use a pop rivet dimpler for all the holes in 1015 and 1018. Not too bad, probably took an extra hour.
For those of you that aren't builders, here is a quick homebuilding 101 on what a dimple and countersink is. In order to have all of the rivets sit flush in the skin of the aircraft, you need to make a little recess in the skin and underlying parts to accept a flush rivet. To do this you either dimple or countersink but they both accomplish the same thing. The difference is the method. When you dimple you basically stamp the metal into the concave shape at each rivet hole. This is the common method on all the skins and thin sheets. However many parts are too thick to stamp so you have to shave some of the metal off instead, hence countersinking.
