Need to keep an eye on what NOT to rivet, it doesnt really call it out in the instructions, but it isnt to hard to figure it out. For example, in the first steps of horiz stab Ch 8, it identified only a few holes not to rivet. I almost got carried away and riveted holes along the leading edges of the skins where the nose skin would need to attach. Had I done that, it would have been necessary and tedious to drill them all out, but it is ok to re-rivet as long as the holes dont get too large.