1974 Unimog window crank handle

I made this handle for my dad's Unimog that he used on the farm. After nearly 50 years this handle finally broke. The handle is originally cast iron so I would recommend using a tougher filament. I am using PLA until it strips the spline gear connection. I am using a 8mm bushing with a M4 30mm screw for the knob. Also I would recommend printing it solid or near that, as the mechanism has a lot of force. STEP and SLDPRT file types included.