Sunfish Rudder Head

I have a Force 5 that the previous owner was using a sunfish rudder head on. The rudder head broke and I ordered a new aluminum Force 5 rudder casting but the quality was shit so I rage designed a model of the sunfish rudder casting as close as I could in case I want to eventually have it machined in aluminum later. I have not printed this yet but might experiment with printing my own casting mold with some Polycast filament and making the part myself. I've uploaded it here on the off chance that someone else with the same problem is searching for help. Simple model included for easier machining or casting.

NOT INTENDED TO PRINT AND USE AS IS
(it would surely fail if you try)