I started with a SS braid and has the same issues with it floating up (or even coming off completely) and many stuck sparges. I switched to a Bazooka Screen ($11.50 on amazon) and never had any issues since. It stays low, won't get crushed, won't come off, the wort clears after about 2qt vorlaf and I haven't had a stuck sparge yet (even on a 50% rye beer). That said, I'm limited to batch sparging but my efficiency ranges from 72-80%. With the SS braid it was 60-65%.
So if you really want to fly sparge then manifold is the answer, otherwise I'd recommend the bazooka screen.