DIY a very cheap & practical Camera Cage for Pro shooting

how to build a very cheap & practical Camera Cage for Pro shooting for your DSLR or Mirrorless Camera in my case EOS M from Canon for building a camera rig you always need a cage. to mount a top Handle and a lot of accessories like Mic, Light, and external Monitor Parts list : from Ebay USA: L Flash Brackets : http://www.ebay.com/itm/Double-Dual-L... U flash Brackets: http://www.ebay.com/itm/C-Shape-Brack... Magic Arm : http://www.ebay.com/itm/11-Adjustable... hot shoe mounts : http://www.ebay.com/itm/2-Pcs-Flash-H... quick release: http://www.ebay.com/itm/Quick-Release... screws : http://www.ebay.com/itm/1-4-Male-to-1...