Wooden slat to avoid losing items out of Port side window

On the R-27/OB and possibly on the R-23 the flat surface at the windshield and adjacent to the port side Nav's window the chance for things to fly out the window is inevitable without there being something installed to avoid this happening. On the R-27/OB prototype model Ranger Tugs did install a vertical teak strip parallel to the window to presumably stop things flying out the open window. However, for some reason they never installed this as a stock item on all the production R-27/OB models. For $0 dollars I installed a wooden slat to protect things from flying out the window.