Not really sure but if you reduse the consume rate this will make it last longer.
Now with ProtoLars/Pl Inds you can set them up to load/unload a product for as long as you want
by difference ways.
(1) setting it up to take as long as you want each car to L/Unload.
(2) set it up to L/Unload how many products from a car every so offten.(log car can be set to load 1 to10
logs every 10 minutes, more or less your choice)Think having 1 log unload from a 10 log car every 3 hours.
(3) You can set the waybill % to what ever you want, before it showed you when it need somthing.
(4)these can work with other Protolars INDs where unloading at one can supply product to another.
If the first one run out of a product the other won't produse.
ProtoLars are more like real railroads where you drop off a string of cars and they will L/Unload while you do something else.
