I have fitted the Mike Satur system to my MGF in Airlie Beach, it has made a world of difference. When I bought the car, it had the Sydney version of Coil Over fitted, however the rear turret cracked as the suspension is anchored to the body work, rather than the subframe.
I contacted Mike Satur, who pointed me in the right direction, provided the complete kit, and it was quite an easy conversion. Took about a day. I have advised my insurance comany, they were fine as it is a well proven solution. Not sure about the registration authorities, the less said to them the better.