The case shown seems like a very nice construction.
The idea of using pre-punched holes for the handle, feet, cable connectors and switches appeals to me. This is because I will want them in the same place as has been predetermined.
The idea of pre-punching holes for the transformers and boards does not appeal to me. I rather have full flexibility for parts sourcing and prefer a construction where every hole has a purpose and is utilized. I can easily drill through a case with a battery powered drill.
A use of threaded inserts seems like good design but I prefer the long lasting usefulness of a simple nut and bolt. A loose insert has too much potential to cause inconvenience. I will not enjoy paying extra for that.
The pre-punched test point holes do not appeal to me because I regard using potentiometers for supply trimmers as a compromise and I want to adopt the use of wirewound variable resistors. If I want to trim the supply I will open the case. If I change my mind about potentiometers I have a drill.
Having said that I am in the USA and already own 4 collective case PSU boxes which I thoroughly enjoy. It seems like the cases proposed here will end up priced at a premium for USA customers so my thoughts about the design may not be as pertinent as the ideas of those who are more likely to make a purchase.
If the case ends up being exactly as I prefer then the pricing doesn't matter. If it ends up seeming as a compromise with a premium price then the price will weigh heavily on a decision.
I normally avoid sharing opinions... who needs more of that stuff
but I do like the case shown in the OP very much and if they do end up as nice as I might hope for I will be excited to use them.
Thank you.