i know its a bit late now sp3no but for getting the old bushes out i'd sugest buring the rubber out so your left with just the sleeve and then cut a notch in the sleeve. it will help to not deform the arm any more than it already is from the factory.

if i had an air saw and a press i'd do all my bushes in a heart beat. an angle grinder just cant get into the intricate little spaces to cut the old bolts!