This is a remix with added inserts of the excellent parametric rugged box that can hold a ZT-703S oscilloscope/multimeter (or a ZT-702S since they share the same dimensions) and some of its accessories.
The two grids have to be glued in to the inserts and some foam can be added on the lid insert where the screen lands.
Note that if you're using the oscilloscope ports cover by @arminth and need a little more space at the top you may want to use this remix of the inlay: https://www.printables.com/de/model/961302-inlay-remix-for-rugged-case-zoyi-zt-703s-with-bnc
The author remixed this model.
Changed the size and added some inserts for a ZT-703S oscilloscope/multimeter