I own a 2012 Forrest River Surveyor and the super cheap shower head/sprayer wouldn't even make it to the back of the 3ft tub, so I had to replace it. I didn't like the angle my shower head was sitting at originally, so I decided to tinker a angled wedge made for the shower head mount to angle it down. It now shoots the water at the top of the tub against the wall.
Note: I did end up putting drywall anchors in the plastic to mount this to and it greatly helped the overall stability, but ideally you would want to mount it to a block of wood or something similar behind the flimsy shower wall.
I used a 1.0mm nozzle to print it quickly and to give it better rigidity. I don't think settings or material make a huge difference, but I prefer PETG for this applications because it's more flexible and stronger than PLA. I'm fairly certain it holds up better against water and heat as well. Feel free to use my design or improve on it. I know it isn't beautiful, but it's functional.
Shower_Angle_Wedge.stl | 9.1KB |