Could make something akin to this but self balancing if you add some roll pivot to the deck, or try using a more standard rc steering method. The self balancing would actually be more straightforward software wise because I’m not sure how to mix pwm inputs to drive tracks without custom code. Also sudden turn inputs from a remote could throw you off.
A single rounded track or two tracks in line with steering trucks like Ivan Meranda is probably a better idea but the landbearshark has it’s own appeals mainly basically being a tank robot when not ridden.
I have been sketching a two inline steering track design for OW frames but sidetracking to a parallel track along the sides of the board sure does appeal.