Bar 153 has tremolos marked TWELVE that I haven't been able to recreate in MuseScore. I wrote it as 4 triplets to get it to play correctly and left a transcriber's note. I don't know if 12 tremolo will be added in the future. This is how I resolved it. If there is a way to write 12 tremolo so it looks like the original score, I'd really appreciate the education.
Thanks, wizards! You're the BEST! :)