Thanks all

The running gear might need conversion to Pedrail rather than caterpillar track.
I have been trying to find a suitable description of the difference.
A pedrail kind of stomps along on a series of pneumatic feet


In all honesty, I thought about keeping the caterpillar tracks as my own period of influence for the game is up until the 1930s.
That said, the Quar pedrails do look quite similar to caterpillar tracks

So I’m actually thinking of swapping out the track units with this one, and simply redrawing the simple tread plates into more foot-like blocks:

