Came up with an idea to make dimpling in tight places easier. I Cut an "Anvil" with a thin edge to go inside the end of ribs close to the trailing edge of the elevators. Drilled the anvil with a #40 hole and used my countersink to create the Female "Die" for dimpling. Then, drilled a hole in the end of a long bolt to use as a holder for the "Male Dimple die" i use in the C-frame. Just smack it with a hammer and "presto".... Perfect dimples in seconds! I will drill and contersink the other side for #30 Dimples.