I just ground to the head when i ohm plugs. I use a $20 Radio Shack meter which works well enough for that.

For removing wires and plugs I use 8 mm and 12 mm combination wrenches respectively. Some folks find it easier to remove the injector lines before attempting to change plugs. I don't, but I have pretty small hands.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.