Can you tell me width and height of half walls? How long is rain shower head arm extension from wall? Want to do something similar with "ledge" instead of bench situated in same area of shower. Our space is much smaller. 66" wide x 31" depth. Our half wall will be 36" wide with a curbed walk in area of 30" (no glass). Want to center the 12" rain shower head to the half wall. Do you think I will have any problems with this set up? Ledge getting soaked or a lot of water out of glassless opening? Thanks for sharing your lovely bathroom!