Hi Bartles,
I typically work mobile while at home and on the road doing repairs.
I use an old heavy plastic chainsaw carry case I had sitting around. I have partial spare sets of old tools that are mostly no name brands. I carry what I use most and some pairs of different wrench sizes that I use. A couple of spark testers, a feeler gauge set, and multimeter come in handy also.
I placed a small cardboard soda crate inside and it holds the tools. I can slide the soda crate out and close up the saw case and use it for a sturdy seat.... Very handy when working on a rider mower engine after the hood has been removed. A spare soda crate is also handy for keeping track small parts and the tools as they are being used.
Once I'm finished working, I pack up the tools in the saw case and grab the case handle and go.
For the saw case top hinge
calcular finiquito, I did replace the cheap plastic pins with section of coat hanger wire.