Perky Box stacker

This is a set of trays designed to hold Perky Boxes (often used for small mineral specimens), and specifically to stack them in these containers:

https://www.lowes.com/pd/Project-Source-Store-All-4pk/5015577737

There are four files. The first is an intermediate or universal layer with top and bottom box sockets (requires support), the second is thinner and only has sockets on one side, so it would work for the top or bottom, the third is the same as the first but with lifting handles, and the fourth is an insert the size of a Perky Box that can be used as either a spacer on an incomplete layer or a holder for two round gem display boxes.

Since this is mostly straight lines and right angles and it is not a structural, print at whatever settings get it done fastest.