with [item=bulk-inserter], up to 1440 items/sec (6 stacked [item=turbo-transport-belt]) with [item=stack-inserter,quality=legendary], up to 3840 items/sec 3.1 sec to switch trains 20 stack. USE 1-4 INSTEAD 50 stack. USE 5-8 INSTEAD 100 stack. 11.11, 4.16 sec per train. can do nonstop trains 200 stack. 22.22, 8.33 sec per train. can do nonstop trains