Are these still available? There not as detailed as I'd like but there isn't much option for Rock Island hwt cars. I know athearn just released some 60' round top harriman cars but in my minds eye they. Just don't look right with the longer walthers pullmans I already have, although I will get a baggage car the add to my work train. I know most of the IHC cars need weight added to improve running quality, is there an article on detailing these anywhere?