[PFSlim]

I first placed the louvers inside the body and marked a line at the top and bottom of the louvers. Then, I glassed in sheet metal on top and bottom in an "L" shape. Once the glass got hard, I put industrial velcro on top and bottom brackets, then some on the louvers. Stuck the louvers in and pressed to a tight fit in the velcro and they don't move a bit. The Louvers should be slightly bigger than your body holes.

Paul