In message , Bill Wright
writes

The next part, which is harder, is learning how to use it.

Thanks Bill. I'm certainly no expert, but have used an ancient analogue
cheapo Eagle meter for years, mainly, I admit, with low voltage stuff
(old toy trains!), but enough to know the difference between measuring
volts and amps. I will, however, shout if/when I'm unsure!
--
Graeme