Also, as my scope manual suggests, use an isolation transformer (if
you can afford one) when working in a hot chassis situation. This
prevents current flow directly between equipment, and maybe you and
ground. The manual also suggest connecting the scope chassis directly
to the equipment under test (bonding) with a separate conductor.


This isn't a matter of "if you can afford one", when working on hot chassis
equipment an isolation transformer is *absolutely* nessesary, if you can't
afford to spend $50 or do some scrounging and cobble one together for free,
you shouldn't be poking around in the equipment under test in the first
place. If you try working on something without isolation you *will* fry your
scope sooner or later if not yourself in the process.