by ranzolger https://factorioprints.com/view/-LWY-DinCSVmp1fy3OVa for RHD, 2-4 trains, set supplied fuel at CC next to train fuel unloading trainstop, give the logistic system a couple of logistic robots http://kirkmcdonald.github.io/calc.html#data=1-1-19&rate=s&cp=3&min=3&belt=express-transport-belt&dm=p3&db=s3&dbc=16&items=processing-unit:r:45&ignore=advanced-circuit,electronic-circuit,sulfuric-acid