what are peoples experiences with irrigation nozzles? what brand/type? I had a quick look at Bunnings and there are so many different types?

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There's a hoon in every Typhoon

Ok one more question, sorry!
When u say the other terminal on the on/off switch goes to ground, does that just mean to leave it with nothing on it?

im eally noob with electrical stuff!

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"Wrong fitment".

Nah, put an eyelet or a fork lug on it and screw it to something metal. if you look under your dash you should find a screw with other wires attached to it. check near your stereo.

And as for nozzles, look for misting type.

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Balls.