Attention: Before continuing it is important to understand that this rig is only as waterproof as the waterproof holders that you attach. We cannot be held liable for damage done to cameras with this rig.
!!!! IT IS ALSO NOT AN UNDERWATER RIG !!!!!
Also note that as the cameras are further away stitching of close up objects will be more tricky due to parallax it is important to be aware of this and if you want to minimise parralax then the Brahma6, Brahma7 or the Brahma Duo may be a better option. After all this trying to point you away, it is actually a really good alround rig with these points taken into account.
This Rig is designed to give your Xiaomi Yi cameras protection in activities where the cameras may get wet, muddy or filthy or dropped on the floor etc. Whilst this rig is pretty sturdy, it is not a Tonka toy and as such not indestructible but your cameras should survive a fall. Note the audio levels will drop a lot so if you need audio then use a mic :-)
There is a video attached showing how to assemble this rig and it relys on you having a copy of 360 video software such as these linked here. Please mention this rig when ordering.
http://www.kolor.com/autopano-video/ and http://www.video-stitch.com/studio/
At the moment my preference is AutoPano video which I purchased, and I have the Pro version which is so much faster but twice the price of the standard version.
Brahma Extreme in the bath https://www.youtube.com/watch?v=AHAdiTXQR5w
Story on the journey for this product. http://www.vrexperience.net/Newsroom.aspx?id=128
Android control software in video. http://bluestudios.co.uk/Brahma/
Sample video playlist https://www.youtube.com/watch?v=FhbCAfFlvpA&list=PLJbDbBITZMCmq9MdpX7k3R18BvIXkKZGB
What do you need
Note the rig is designed for this specific waterproof case but most Xiaomi Yi cases should work, I have tested another, but to be safe get this one. This rig should work with GoPros which I have tested one third party holder and it fits ok although note the backstops may not be as accurate. I would order spares as well, so maybe an extra camera, case and screws but that is just me :-)
6 x Xiaomi Yi's http://www.gearbest.com/action-cameras/pp_153557.html
6 x Xiaomi Camera housing http://www.gearbest.com/action-cameras-sport-dv-accessories/pp_210691.html
6 x M5 x 25mm hex bolts http://www.ebay.co.uk/itm/321232365051?_trksid=p2057872.m2749.l2649&var=510171044638&ssPageName=STRK%3AMEBIDX%3AIT
6 x M5 Locking nuts http://www.ebay.co.uk/itm/360650014234?_trksid=p2057872.m2749.l2649&var=630118289296&ssPageName=STRK%3AMEBIDX%3AIT
Please watch the video for more details.
My video explaining why not an underwater rig at the moment.