I ask re the notches as you could improvise a tool - the correct thickness bit of steel in a vice, slot the frewheel on top, try and turn and see if it gives before you get a hernia.
@veloham started
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I ask re the notches as you could improvise a tool - the correct thickness bit of steel in a vice, slot the frewheel on top, try and turn and see if it gives before you get a hernia.