Hello! I'm planning on making a fanned fret 7 string tuned from E2 to A4. I plan to use an 8 gauge string for the high a, but am worried about snapping it trying to perform a whole step bend. How short on the treble side would you think would keep me clear of snapping on the high A? I was thinking a 22"-23.5" multiscale, but I'm hoping someone with more experience might be able help.