In the first post I showed how I modified the deck and assembled the basic kit.
The impetus for this particular project was a photo of a T&P flat car which also includes prototype information for that and similar cars.
Since I had the CofG kit, I decided I might as well finish that one too. The set of decals comes with a diagram for the car, and it's about a foot longer than the Tichy model. Should I bother?
Sure, why not? In this case it's just adding a single board to the length. As I was reassembling the deck, it occurred to me that instead of just cutting it in the middle and then cutting a single board from a spare deck, it would have been easier to cut out a chunk of, say, four or six boards and replace it with a piece of five or seven boards. That would have been much less fiddly than trying to square and insert a single board.
They have some photos online of when they moved the car and a work session. It is noticeable that the fishbelly center sill wasn't as deep as the Tichy model, much like the NH car. I thought that the center sill from a Branchline (now Atlas) ACF/URTX reefer would do the trick. It's about the correct length after I added the extra board to the middle:
This is too deep, here it is compared to a spare bolster:
It looked like I could cut along the rivet batten at the bottom and it would be just right.