Prepare the Grand Panjandrum!
I had another old ashtray that made a perfect diorama base, so I built a companion to the Smith Gun diorama.
The Grand Panjandrum is an even more obscure Allied weapon from WW2- only making it to prototype stage and possibly being a bluff. I found a 3D printable Panjandrum on Booth and once I sat down and started the diorama, it went together over a weekend.