minor update for anyone still following this thread!
Caught up with Phil from Eurospec in Balcatta yesterday and loaded up a tune on the RS4 which allegedly nets +18kW and 25Nm... And would say that the bum-dyno certainly supports that sort of improvement all through the rev range! Car feels great!! Very happy with the service and results!
Also ordered a Magnaflow cat-back system from Phil at the same time! Should be here in a month or two or three... :P
http://youtu.be/LtfRLQgExIs
http://youtu.be/3OZWVDOVd44