I am moving all my touring gear into 200mm x 200mm boxes for storage in and out of my tool box. 

This one is for my Multimeter and leeds.

There is some space which may allow fo larger models as well.

The lid has both magnets and heat set threaded incerts for the velcro. This may feel a bit like belt and suspenders but I generally have to fly my tool box places on passenger flights so they go through alot of wear and tear.