Very interesting. Not a lot of room inside the trolley for a module, but perhaps there's something relatively small that could be used.
Right. Google found a photo of an open interior trolley which actually had a ruler. I then took a photo of the dual-timer module and an AC-to-DC converter module - and made the photos roughly the same scale. I suppose one might find a way to cram the two boards in sideways, diagonally, or whatever and some remodeling...but would no doubt block silhouette figures creating dark spots.