I tried to do this job once by leaving the final drive bolted to the swing arm. That makes it really hard to put everything back together. Just better all around if everything comes off one piece at a time and back on the same way. I no longer believe in short cuts. They end up causing more trouble.
When I was younger I could do a lot of things I differently.
I think I did hear once about somebody doing this job the way George describes it. I guess it can be done that way. I just don't see any advantage.
EDIT; Oh.But ME 109 might have something. Don't remove swing arm, but move it back an inch or two. I think that way is common.