Hi everyone - I realize this is an older post, but wanted to chime in as I was the Wood Worker that built the retirement shadow box for CPO1 Allan Walker on his retirement. Also, I can answer that yes, I have seen some people insert their medals in their retirement boxes - please see enclosed image of CPO1 Jeff Bombay's retirement box that I built for him - his included two flags and his medals.
For more images of these two shadow boxes, please visit my Lumberjocks site at: Link removed as per Site retail advertising rules.
Hope you all enjoy the pics and information...
s.
Wisty