Not to be flippant, but you realize that that's totally unconventional and strange, right? If you really, really don't want to just write the music out, then you're asking for a DS al fine. That's what it's for.
What you did is fine for sheet music that you're writing "just because." But you'd get a lot of raised eyebrows from publishers or musicians looking at that music.
And I still think simply writing out the 8 bars again is a better option.
Good luck.
-P