Maglev express train trick

introduction
if you need more materials,xp or gold the maglev train is the answer.in this trick you can call a maglev express instead of ordinary express

items needed
maglev track,more than 4 whistles,

steps
step1: call express trains till all the tracks are full

step2:dispatch the maglev train

step3 :call a whistle and the only train coming will be a maglev train