Advice on Fitting Powerflex Front Wishbone Rear Bush

Real bitch of a job. I've done a few of them now. Lots of grease. Couple of pairs of hands. Bush under the wishbone on an angle, large diameter pipe or bearing race above the wish bone pressing it over the bush. Got there eventually.
 
How does the old one remove? Am I removing just the rubber section or does the raised up metal section get pushed out?
 
Burn it out. I tried pressing it out and broke the wishbone .

Does the metal collar it sits in get pressed out also? Don't have the powerflex part on me just now so can't tell. Ive got the front one pressed out the arm so wasn't sure if its the same for the rear.