Panicked by the idea of not being able to get more 40-ft boxcars for harvesting rivets, I contacted Athearn's Parts dept. and found it would not be problem to get more. In addition to this backup supply I also ordered tanks car parts to pursue kitbash project for 10K General American tank cars inspired by RH a few years ago.
I also ordered 2 50-foot gons bodies along with their U/F's for use at the Shake 'n Bake Bash on the Beach project coming up in a few weeks as I wanted to work with undecs and want to do two cars if possible.