I´m currently working in this nice kit. It´s from Wiseman, many castings are from the old Durango Press kit. I found easy to work with wood and white metal castings, needs some work, but is very funny to work with it.
I started with the iddler flat. I will replace all factory trucks with new ones from San Juan car Co., I found its trucks much better than the white metal ones.
Pics of the underside completed with rigging and brake system.