1 - Same as a Power FC (but better), the way a hotwire AFM works is an output based on air temp x air flow = air mass (hence the correct name Mass Air Flow Meter)
2 - To return to standard just move one small jumper connection inside ECU, to remove board is a bit harder.
3 - EPA (vic) does closed loop testing through the factory consult port, which still works with remap but not with power fc or any other aftermarket ecu.
I already make frequent trips to sydney, e-mail me if you want to try work something out?
Sydneykid - some valid points, apart from the tuning costs, I charge the same regardless of ecu. You also mentioned not having to buy a consult reader (AUD$130) but then mention you need a Dataloggit (AUD$465), which even then cannot do some functions such as power balance testing (dropping out one cylinder at a time), simulate water temp corrections, selectable AAC position, all of which are useless as far as a driving point of view goes, but with some of these cars getting past 15 years old now it makes diagnostics and testing so much easier. We are also now selling real time tuning packages to several workshops, all over the country, which chould be up on line in a matter of months...