There is definitely a steep learning curve. It took me 8 hours to do the first flap and only 4 to do the second one. To be fair, when I did the first flap, I also put together some of the brackets for the second one, but that was only about 30 minutes, so not much effort. This flap went together pretty easily, and I remembered again to leave the edge up against the wing non-riveted so I'll be able to straighten them if I need to. Also, present-me gave future-me a present and wrote down what size rivets to use, since the countersunk ones are 4.0mm and the domed ones are 3.2mm. I also left a note that I needed to pre-drill the 4.0mm rivets, since they were originally 3.2m and expanded a little when I dimpled them, but didn't expand all the way to 4.0mm. Present-me left that note for future-me, too. When I get this ready to go, then-present-me is going to thank then-past-me...I hope!