Unfortunately I can't wedge a breaker bar against the studs as it then gets in the way of getting the socket on the hub nut.
I guess I could remove the de dion ear complete with half shaft, but I'll still have the problem of tightening the nut up again. I used to have prisoner alloys, and the socket would fit through the centre hole in the wheel so I could have the car on the ground, wheels chocked and brakes on to torque the nut up. However, I've sold the prisoners and replaced them with minilites, and the socket doesn't fit through the centre hole.
Dave