[tselling]

I like to have the Series name and Series Index first with a dash before the Title so I use:
{tags}/{series} {series_index} - {title} - {authors}

This works for ebooks with a series but I get just a beginning dash for ebooks not in a series. Is there a way to make the dash conditional on if there is a Series value?

Alternatively is there a way to not have the Title at all if there is a Series and Series Index, but to use Title if there is no Series information?

Thanks for any help with this.