Rear screen prob does drain quite a bit. Have u looked at wasabi batterys? Id be suprised if they dont have one. I run the extened batt so no screen fer me. I use a copy of an explorer pro housing so the screen wouldnt do me any good anyway. Had the gp dive housing seep to many times(rated to 200ft my ars) and it seemed silly to wrap a 300$ camera in a 30$ housing. All the buttons and springs in the housing were rusting pretty good by the 10th dive. Using gp studio since that what u need to connect to the camera. Windows linux apple android all the same to me. Just happy when i can make it turn on.lol Not a computer guy Sorry. Make son fix that stuff. As long as i can see my pics and make my videos im happy.win MM does suck i must agree. Gp studio much easier to work with. Im running wide angle and divin mostly caves so silt outs/bad viz r more of an issue then cutting stuff in half. Do most of mine as training aids for myself more then anything else. Have my housing pointed off my helmet so it sees whatever is in my field of vision so most shots come out pretty good. Also have 1 of my helmet lights pointed to the center of the cam pov if i need a ref.