Sad to see, but I also I have a whole drawer full of those cutoffs. Years ago I started buying cheap Taiwanese and POC wrenches and used those for special jobs. HF used to sell bulk packs of the most common sizes in metric and SAE, and those came in quite handy when the need arose to cut one up.
That said, I'd be hard pressed to cut up a Blackhawk -- or even a C-man raised panel, unless absolutely necessary.