Can anyone suggest where to buy Avo 8 (or similar) style test probes?
I mean the sort of test probes which can be hooked onto terminals
and/or wires rather than having to be held there.

Super-safe insulation isn't vital as these will almost wholly be used
on 12 volt systems. Sound attachment is probably a bigger safety
factor than insulation given that the current available will pretty
instantly melt a clip that drops across the supply (200 Ah starter
battery and 3 x 120Ah leisure batteries).

--
Chris Green