If you turn the Inertia to zero you get absolute direct control of acceleration with no delay. That Is how I prefer things then driving becomes an issue of gently rather than harsh turn of the control lever. Have a play with that and see what you think. I find a real pleasure in starting a train or stopping it under complete control to reflect how a real train starts rather than let a chip do it.I must confess I am new to their products and possibly you are right about the inertia, I sort of set it halfway and leave it. One of the settings is indeed half speed, not that these shunters are very fast anyway, but it will be played with, just to test it obviously