I ran across this PDF, which is a digest of a handful of posts, explains how to set up JMRI. Reading through it, it explains a few things that many of us have found out by trial and error.

https://rcairgallery.com/stuff/Using-JMRI-Operations-A-Worked-Example.pdf

I printed it out. That might come in handy. Thanks.

Shouldn’t the "pie fillings " on part 4 be refrigerated ?

Edit to say …thinking FRESH here ?

Well, they are using powdered milk at this bakery, so I’m pretty sure the pie fillings are canned, and thus a boxcar is appropriate!