I have recently picked up ho scale airslide covered hoppers, mainly older walthers, these have the plastic wheels, where do I start in replacing the wheels and do I have to replace the trucks as well?
next I have some ho scale athearn and atlas RTR 2 bay covered hoppers, with missing stirrups, grab irons etc where should I start with getting these parts as well, i'm new to do this so any help will be useful
thank you
mark