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I have the Elephant bushing tool for 911s at my shop and I seem to remember it did not fit the 944 spring plate. Maybe there are 2 different versions of the tool.
Nonetheless, the burn 'em off and wire wheel method works best anyway. An oxyacetylene torch is best; propane will do but it takes longer.
I used just a couple of minutes of heat from a propane torch and then separated them in whole pieces with a screwdriver. It was very easy. They went to the zinc plater pretty much as you see them here (I scraped away as much of the remaining rubber as I could but there were still very thin traces left):
...and came back like this - basically brand new:
I'm not sure if burning them away completely is easier - it seemed like it would have taken forever with my little propane torch, and probably made a lot of smoke etc. This way was quick, clean and easy.