Miles, I find the Rail King PS-2 or -3 locomotives to be of a comparative amazing value. For about the same cost of buying a PS up grade package and paying for it to be installed, one can purchase the complete engine with PS working. Sweet!
Have not had the zinc pest visit as yet but keeping a watchful eye out for it. Trucks and underbody features I could deal with, the tender shells,, not that is a deal breaker,