The Kobuki base by itself will not drift, so it is sensible which the tilted inertia leads to the drift. Needless to say I am able to hack my URDF with a weightless superstructure, but I wanted to take care of this in a far more realistic way. I tried https://www.uk-exhibitionstands.co.uk/bespoke-exhibition-stand-design-services-across-the-uk/