I would like to see a Telescoping arm. Something that can attach two parts of a ship or base to extend and contract. This would work great for my HV https://steamcommunity.com/sharedfiles/filedetails/?id=1606088345 The pilot seat of this craft is underwater. By replacing the vertical shaft with a Telescoping arm I would extend the range underwater by connecting the pilot section to the upper pontoon. This would allow me to adjust the height.
