Adding weights to passenger cars to stop derailments?

[RobertInOntario]

If weight works, do it. Your layout is small and you have no grades, so the adverse affects of too much weight won't be felt. When I was much younger, I attempted to make Athearn 6-wheel trucks track better on poor track by taking out the center wheelset. That worked with marginal success.

Thanks, Kevin -- I've already pulled out the centre wheel-set on the worst offender. So far it's working better! Rob