I'm afraid that your attachment did not come through, because it is too large for the Ask an Expert forum.
Nonetheless, I may be able to answer your questions:
- In a transcription that uses the Nemeth Code, main items should be in 1-5, and subitems should be in 3-5 (even when the main item is only a number or letter and includes no words).
- Yes, in the phrase "less than 1/4 turn" only "1/4" should be enclosed in Nemeth switch indicators.
Thank you for the questions and for trying to include an attachment. If the above does not fully address your concerns, please do follow up here.