The Hydrophobe is a 255mm water resistant 5" cine quad with a 2mm aluminum mid plate that doubles as a heat sink for your esc and vtx. It has a 3mm bottom carbon plate, 6mm arms, and 1.5 mm top plate. A TPU skirt keeps rain, snow, and dirt out, augment it with sealant to make it as waterproof as possible.
Use nonconductive thermal paste to¬†transfer heat, but don't let bare boards directly contact the aluminum.
The arms have mounting points for floats. I epoxied standoffs in pool noodles for a quick and simple float.
Hero 5-7 or 8 cam mounts are available. The DJI skirt has antenna holders, the Analog/Vista skirt has a 17mm antenna tube. An Immortal T holder is also available to screw on to the top plate.
Read more about it here.
You can print your own parts here.