I needed to reduce the octave symbols to 80% of their sizes and still use parentheses on the continuation. But this is what I am getting:
I’ve had exactly the same issue. See this thread from last year, which references this explanation.
Thanks so much Mark. What I gleaned best from the threads is to create a playing technique line and use a smaller point size for the 8va text. I’m not concerned with playback, so that will be fine.