take it to a garage, easiest possible way, will save a lot more time messing on when you can give it to someone thatll be able to do it in a few mins.
surprised you cant hammer a smaller socket onto them tho.
johnny were you worrried the spacer will melt with weld? dont be, they take some heat to disfigure.
why do you want the hub off? or is it just for the adadptor?