The recessed base and backplate are one piece, the recessed top cap “locks” the backplate and MM together. Pretty sturdy.
Kinda bummed that all the Museums are a different size. To save curse words, I ended up making a one-size-fits-all design to meet the largest dimensions, so some have a bit of slop. May choose to custom-fit and bottom-light the next set, once this novelty wears off.
we have the original mini museum. my wife likes it (an xmas present for a nearly impossible woman to shop for), but didn’t love it enough for me to continue to buy them.
Now why didn’t I think of that! We gave the original one to my impossible to buy for Father in Law and more recently we bought version #3 for ourselves because we didn’t want to be left out owning something so cool!