This evening I dimpled the firewall, and countersunk the stiffener angles and spacers that will be in contact with the firewall. I laid out the spacers on the firewall and marked them to make sure I countersunk the correct side. I primed the spacer countersinks before ending for the evening. The next task is to scuff, clean, and prime the angles.
Getting ready to countersink firewall stiffeners.
Firewall dimpled, and stiffeners and spacers countersunk.