Tonight was halloween and we had a few trick or treaters at the door throughout the evening. Even more scary, however, was the prospect of drilling into the center section. These are matched parts. If I blow it here, I will have serious problems, since I could not purchase another center section from Vans that has been match drilled to my wing spars. I carefully re-read the plans and instructions and then I drilled, deburred, primed and riveted on the seat brace angles and the aft uprights to the rear center section web. I made some riveting mistakes and had to drill out some rivets, but all was well by the end of the night.