Thank you! That did the trick, and took waaay less than the hours I spent on it trying to figure it out myself today...LOL!
For the record, if you started your book collection back before the days when a program would maintain metadata for you, and thus don't need the series index because you've saved the file as such many many moons ago... *grin* Typing the plugboard transformation as this will work wonders:
{series:| |: }{title}
I just removed the plain series parameter, then took the _index out of the second parameter - previously it was : {series}{series_index:| |: }{title}
The books are on my iPad in the desired format now:
Series 01: Book Title.epub
Author Name
Maybe I'll work out the syntax to use a dash instead of a colon next...or not. LOL
Thanks again
~Yira