Don, Here is a cool set of dies that can be used to dimple in places inaccesable to a squeezer. I purchased them from Planetools.com. I like TOOLS!!!I am confused as well, I know of no way to dimple them now except machine countersinking them. The big question to me, is what the heck is the "option" and how to you cover up the center hole if you decide to not exercise the "option". Is part of the ELSA avionics kit using this place to mount an antenna or not?
Don, Here is a cool set of dies that can be used to dimple in places inaccesable to a squeezer. I purchased them from Planetools.com. I like TOOLS!!!