Do you find there's much overlap between the areas? e.g. if you have two PCs, do...

Do you find there's much overlap between the areas? e.g. if you have two PCs, do you keep two sets of screwdrivers?

I'm drawing a parallel to DRY when programming - First time copy it, second time move it out somewhere.

However keeping cables/cable tidies/diagnostic USB inside the machine, and labelled is a fantastic idea, and I will be using that. Thanks!