I had previously riveted the upper wing skin and blindly missed the part about the wing walk doubler. So, I had to drill out 40-50 rivets and place the doubler. Then I riveted the hole thing per instruction. All in all not bad. All the rivets came out easily. So, basically, just wasted an hour.
Now to the flap and aileron. All parts are made but I'll need to cut out the skins.
