The Kobuki base alone won't drift, so it is sensible that the tilted inertia brings about the drift. Naturally I am able to hack my URDF by using a weightless superstructure, but I wanted to deal with this in a more realistic way. I tried all I am able to https://www.uk-exhibitionstands.co.uk/product/infinity-led-light-box-display-stand-950s/