The metal under those plastic covers is very solid. I had to drill out one of the holes a bit to accomodate the bolt in the back of the Qs8's as it was a bit to small for the bolt to fit through.

On the top side I just used 2 screws to go up into a raftor. The drop down area is actually our heating/cooling ducts that run across the basement and also enclose the I-Beam.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85