So that I don't have to worry about destroying my elevator or trim tab, I have chosen to fabricate riblets instead of attempting to bend the tabs. This went together fairly easily. It is a bit tight, so I'm sure I will be using MK319 rivets in a couple of the holes. All in all that location should be significantly stronger due to the riblet, not to mention easier. Lots of other builders have done this before me with lots of success. I also worked on drilling the trim servo to the cover plate, dimpling the holes etc. The front two holes (closest to the notch) had to be countersunk in order for those rivets not to interfere with the servo when installed. I decided to use the NAS rivets with the small head for those two rivets so that I didn't get a knife edge with the countersink. I also smashed those rivets just a smidge past “perfectly set” for clearance. Servo installed and nylon nuts tightened.