I just installed the ES master kit so I didn't get trailing arm bushings. I don't imagine they'd be fun but I'd guess the biggest problem is trying to manhandle the entire rear trailing arm itself to work on them.

I like steel nipples. How about greeaseable nipples. I love to see in a service manual "nipples need greased every 15k miles" or "hey, I got a new lower control arm" "oh yeah, do you have greaseable nipples." What a strange world we would live in.