Sometimes parts are worn out or broken beyond repair. The original part #8581 (right) is a lever and bracket assembly that supports a pivot point for linkages going back to the tachometer regulator. Like several brackets in the fuselage, it is cast from pot metal. This bracket had many cracks and was broken in several places due to fatigue. We made the substitute (left) from aluminum. Ours doesn’t look as cool but is functional.