Vert Stab Disaster

I started dimpling the skin and ribs for the vertical stabilizer tonight. All was going pretty smoothly until...I screwed up. Using the DRDT-2 dimpler is great. It's easy, quick and the dimples come out spot on, see pics below. The screw up happened when I was using the pneumatic squeezer to make the dimples in the ribs. It jumped out of the hole and punctured a new one, rookie mistake. So this, I'm sure, will only be my first mistake and others will follow, I just hope not many. I'll be ordering a new rib in the morning. (2.25)