Another angle grinder. That makes four, all the same. Bosch GWS 7-125. They are cheap (used to be AU $75, now $85) and having several means less farting around changing disks for different stages of the same job.
The molded carry case has a lot of internal structures intended to hold just this grinder, cord and accessories. Which make the case useless for anything else. I never use them, and in the past have always thrown out the cases immediately, as they are a waste of space.
This time, mounting a new 'all materials' thin cutting disk on the grinder I thought hey, of course it cuts plastic too. Actually all types of disk cut plastic, or rather melt it way, but I hadn't previously thought of applying the grinder to it's own carry case.
Anyway, all the case's stupid internal moldings were easily cut away. Now I have a generally useful small tools carry case. For free.