There are some measures of Beethoven sonatas that require that 4-5 trill, but generally it's important to recognize that it's all in the shoulder. Perhaps you can focus on playing those measures, single-handedly, of course, and develop a comfort level with getting your shoulder into it. Don't end up like Robert Schumann, amigo.
Joke for the day:
What's the definition of an optimist?
A folk musician with a mortgage.