DIY Dive Housing For RX100?

[CaveSloth]

I want to buy or build a cheap, transparent dry box with a standard 1/4" mounting thread into which I can put my RX100 recording video and take it down to the depths with me. I don't care if I can't touch any of the controls while I am diving. What is the cheapest option for me which will just hold the camera securely, be mountable on my DIY light tray, not screw up my buoyancy too bad, be transparent and keep my camera dry?

BTW I already have a gopro mount so if it could fit that, great.

 

[Lewis88]

Meikon Underwater Waterproof Camera Diving Housing Case For Sony RX100 III 3 | eBay

I can't see why you would attempt to DIY a housing for your camera worth hundreds of dollars. The risk is far too high IMO when solutions are available relatively inexpensively.