Drilled holes to mount the Strobe light power supply and ELT mounting panels onto the inside of the fuselage behind bulkhead 6. Cut slots into the panels to provide plenty of clearance for the rudder cables. Even thought I cut through the entire flange of the panel to provide maximum clearance for the cables, I figured the power supply and ELT would prevent the panel from flexing after installation. I definately did not want to leave any sharp edges for the cables to rub against during motion.