Four angle brackets for the safety harness anchor points were fabricated from 1/8″ x 1″ x 1″ 2024T3 extruded aluminum angle.
The brackets were cut out with a hack saw and then rounded with a bench grinder and any sharp edges filed away.
Three 1/4″ holes were drilled in each of the four brackets.
The brackets were cleaned and soaked in alodine.