Completed riveting the horizonstal stabilizer skeleton. That pneumatic riveter makes the work fast and easy. I pulled a few rivets with the wrong rivet head. I think this is an easy mistake to make. It was the first time I had to drill out a few rivets. i initially feared this procedure but it worked out very well. I found that an 'automatic' hole punch was very useful to punch out the duds after drilling. I plan on painting the A5 head head or some other obvious color so hopefully I wont make that mistake again.