Nate, we have been discussing this and have decided that the kindest way to transcribe this is simply to transcribe only the equals symbol in Nemeth. Since it is a Nemeth transcription, the UEB equals sign is not an option. By using the Nemeth symbol, you remain true to the print.
Defaulting to EBAE is not something we should be considering. Use the established UEB symbols and Braille Formats guidelines (Section 20) to transcribe the pronunciation and stress marks.
It wouldn't hurt to explain what you are doing in a transcriber's note, or on the Transcriber's Notes page.
Lindy (and the committee)