About car weight

[RobertInOntario]

I would leave them alone unless you have problems with derailments now. Lighter cars tend to derail easier, but cars that are too heavy are difficult to pull and your locomotives can't pull as many. I think a general rule would be to make your cars as light as possible until they derail.

I basically agree with this advice, above. I've added weight to 1-2 of my freight cars, if I have persistent problems -- yet I'm still not 100% sure if it has really helped. Rob