And yet the cabins and seats in Ep22 are clearly human sized. If the scale was consistent, then the inside of the Trainbots should be gigantic for Gorter and Papika (much like the tube car seats were huge for Spike and Carly in Desertion of the Dinobots). So sometimes the Trainbots are scaled for humans and other times they're scaled for Transformers. To be fair, inconsistent scale is hardly unique to this series.