I think some people just ask for a spare playfield versus having it fitted. Hence the dealer was fine for that warranty claim probably.
I reckon less than 160 to 200 games in total have come to Australia. (all acdc models)
I was told that each dealer(3) had sold around 100 machines each snapperjoe has sold around that number. There has been one that smoked. did not take out the fuse and cooked aux power board. and some problems with ball traps around the cannon. Also some issues with wet plastics(print not cured)and sticking to the protective washers, Stern should have better QC . But still a great game when bugs are sorted. Oops 300 of all ACDC models