[HO] 40' PS-1 boxcars with 9' doors kitbash

Here's a quick link to the finished models (HO scale):

These boxcars were on the roster of: Chicago & North Western, Green Bay & Western, Lancaster & Chester, Louisville & Nashville, Milwaukee Road, Missouri-Kansas-Texas, Southern Railway.

There are no commercially available models to match these cars, but an E&C Shops 50-foot PS boxcar kit (also marketed for Branchline Trains) was used as the basis of a kitbashing project.

Here's a draft of the modeling article:

Craig Wilson modeled a GBW and a MILW car, but his method is appropriate for all of the other railroads -- except for the paint and decals he used.

I haven't attempted this project (yet... but Craig certainly has!) -- I would appreciate any comments that could help clarify or expand on it. Thanks.