After the stiffeners were cut to length, taper trimmed, and ground down and deburred, I measured out the appropriate rivet spacing. Here's a picture of the rivet spacing fan that I use to accomplish this.
Here's another shot of the fan in a smaller spacing position. You just pull it apart until you've got the spacing that works, and then you trace the holes onto whatever you're drilling. Saves a buttload of time, calculation, and mental effort. You only need to be barely awake when using this.
Here are the right elevator stiffeners complete and ready to be drilled to the skin.
The left elevator has the cutout for the trim tab, and it on the underside there's a removable plate where you have access to either the trim servo (electric trim) or the trim actuator adjustment (manual). Regardless, you need a reinforcement plate to stiffen the skin where the removable plate attaches. Here's the reinforcement plate being drilled to the skin.
At one point in the evening, I looked over and saw this little fuzzy rat bastard. He seemed to like the light, because he bopped into the garage and just hung out for a while. My cat wishes she was out here...
Here's the right elevator skin getting deburred after the drilling was done. You can see I did the soldering iron thing to remove just the bare minimum skin protection film.
