To build a tank with remote control it is good to know some essential things about what you should use depending on the project you want to achieve.
The basic materials from which you can build the case can be such as: plastic, thin sheet, wood, fiberglass or sheet over 2mm for increased strength .
For example, my first project is made of aluminum frame covered with thin sheet and the turret is made of wood. All these materials are quite light but the tank is less resistant.
Below I put some pictures with my tank and the aluminum frame
Before using the sheet I tried to build the outer shell made of more elastic plastic, which has a pretty good result on the weight side .