Continued riveting the tail cone together. Almost done with the left side. However, I made a mistake by using AD3-3.5 rivets on the side skin/tail bottom skin/J channel. I didn't realize this until I almost done with the riveting (only 3 holes left). This is a place that is hard to inspect without a mirror, so I thought I would better inspect them when all is done, and kept going. The result is I had drill all of them out which went alright with some care. After that I put in -4.5 length rivet so there is enough material to fill the slightly enlarged hole (not due to drilling, due to expansion of the previously set rivet). The heads look acceptable afterward.
