So I've been lurking in the back ground of these forums for a while now and I figured it was time to bring my design ideas out there for ideas and criticism.
first idea is the PV and endcaps I've opted to use a .25" walled acryllic tube and custom milled 1.25" endcaps with two O-rings each.
second I want to have two sets of batteries onboard and the ability to switch between them over the tether. To accomplish this I plan on adding a second (smaller) PV with a sylex usb terminal server an arduino with relay board,, power supply and the topside adapter in it. This will also provide me with open USB ports for down cameras. I was hoping to tie the depth sensor into this arduino so I could attach the vehicle to a weight sled and get it on depth without wasting the main batteries.