Installed the gap seal on the left wing. This included match drilling after trying to make it have the same angle as the wing skin. we had a heck of a time. We used the hand seamer to crimp it. I was a little overzealous on flap seal and dented the bottom a bit. where the 2 meet in the middle didn't line up like we wanted. When we disassembled to debur Brenden a dimple remover tool to get some of my dents out. After we reassembled we riveted the remaining wing skin rivets and the gap seal under the wing skin and also to the rear spar. We then checked for clearance. Brenden used a ball peen hammer, per the instructions, and creased the underside so the flap would clear. He was no happy on how hat looked, but the flap cleared.