Hi there , has any body found the perfect tool box yet for being a fridge mechanic ?

I have been through several canvas carry totes
Steel tool box's
Plastic tool box's

I still can't find a perfect tool box !

I thought I had a good thing , a tool bucket , plastic with wheels , tub in the middle for the big tools , canvas organiser around the sides , But it has failed as well.

I need some idea's

Any body got any thoughts ,

I work on all sorts of stuff from Domestic a/c to large comercial a/c plants and all sorts of commercial plant from kitchen to processing plants

So I carry every thing from a 4" shifter to a 12" shfter and everyting in between