Braked diff steering rover anyone?

Just curious if anyone have tried out brake diff steering for a rover. I am toying with an idea to create a belt driven rover from a lawnmower. The only way I know to make this steer is to make use of brake diff steering - something I assume can be done with a regular steering servo.
I know this steering method is somewhat ineffective, and I think this type of steering makes straight line driving difficult. But with a single engine, diff based drivetrain - I fear this is my only option.

I noticed that the chassis subforum is deprecated. Can anyone recommend a good forum for discussing rover chassis and general tech?