First off, that tile is awesome. Especially neat having the benches tiled. I really like the look.
I can't speak to the jet question specifically, but I am curious about the height of that bottom outlet of the four. Actually the bottom two of the four. It looks like #4 is right on top of the seat and #3 is not much higher. Are they high enough to be useful as a back "jet"?
Maybe the perspective of the photo is just hard to tell. If you sit in front of it, does the height of the them hit you where you want them to?
plat.