Change recipes and research prerequisites for the Electric Train mod so that the higher tier trains/wagons better fit into the Krastorio 2 tech progression. If you have Krastorio's "Rebalance vehicles fuel usage" setting enabled the stats for electric trains also get updated, for a better balance against the native K2 trains. And as a bonus, the Mk2 and Mk3 cargo and fluid wagons get an upgraded equipment grid over the base ones.