Okay, I will check for the motor oil drain hole.
But I have drained and re filled.
Measured what came out, pretty close to 170ml, but not more.
Have refilled and we will see.
I have to say that I think it had pretty much stopped leaking, what was still coming out was probably what was inside the hub.
Have given it a good clean too, but used the air compressor to blow into the breather.
Fingers crossed,