For years, in fact forever, my rolling stock has lived in the boxes it arrived in, regardless of whether I bought it new or used. In the case of Bachmann stock, that means either large or larger green boxes with a great deal of dead space inside. When you put it all in the cupboard, a lot of space is used up.
I have in the past combined two smaller items into one box by simply cutting the unused foam off each so that they fit side by side. That worked but you’ve also then got to label the boxes to remember what in each. As Lorimers in Caterham were selling Really Useful Boxes, I bought two 4l and one 9l, all of which have the same size footprint.
Using some foamcore board that I had in stock, I cut dividers to go between the various items of rolling stock and, using the thin foam that came out of the Bachmann boxes, added softer spacers to protect the Kadee couplings on each end.
This photograph has been doctored to overlay the names of what item should sit in which space and will be printed out A4 and laminated to live in the box, visible through the transparent lid. I hadn’t realised quite how much stock I had accumulated!
I may yet hot glue the dividers, once I’m happy that this arrangement works well for this box. The soft foam would also be glued in place to make the whole thing less messy.