Any one know if there is anyone capable of tuning an EFI mini somewhere in Melbourne, properly.

I have tried Linx, they are capable but mostly its guess work with EFI.

why does it need a tune already?

Not much go wrong with these just normal tuning like spark plugs/air filter/fuel filter. So most workshops should be able to do this with no problem but one thing to point with the garage is get them to look at the vaccum hose that runs from the intake manifold to the ecm. Check this has no splits in it this can cause major fueling problems mostly at idle with running too rich

I have investigated the cost of buying my own device to do some re-tuning, both here and in pommy land. I have come to the conclusion that it will be better to uprate the unit.
The one I was looking at came with it's own adjusting floggle toggle, just need to borrow me daughters lap-top.
Uprating it also means it can handle more, the original unit won't cope with anything more than minor tweaks to the system.

but one thing to point with the garage is get them to look at the vaccum hose that runs from the intake manifold to the ecm. Check this has no splits in it this can cause major fueling problems mostly at idle with running too rich

What he said. Mine idles like a Biatch.