So I just got home from work and checked the mail. Looks like the diffuser kit for my MMR just showed up. The diffuser is a large sheet of styrene plastic and a few smaller pieces(for the smaller led boards) and it looks like you install it in between the PF and the main board(and smaller led boards) using existing screws and holes. I have my daughter tonight so I won't be able to install it until tomorrow after work (or maybe tonight after she goes to sleep) but here are a few pics in the meantime.