DIY Anamorphic Lens Support Bracket and Using as DIY Anamorphic Lens Adapter

I found that at a site.

MATERIALS
Aluminum bar, anything around 2” wide, and 1/8” thick.
Rubber coupling for 3” pipe – the kind with two hose clamps on a rubber tube
8-32 x 3/8” screw, flat head
Brass 8-32 knurled nut – wing nut would be fine...