I spent 10 years flying out of DRW during the 80's and the RAAF handled Approach & Tower in those years. For their experience level, most of the controllers were quite good and back in the old days of ops control, they often put paid to suggestions out of ops that they should do what ops said. It was often nice to watch!! Biggest problem back then was the amount of on the job training conducted - it seemed to go on all day every day and the industry were the ones stuffed about as a result. One thing that the local RAPAC achieved back then was that the terms of controllers in DRW were extended from 2 to 3 years. Don't know if that is still the case, but back then it certainly watered down the amount of training that we in the industry saw. DRW was certainly a good ATC training base for them as it saw a great variety of aircraft and operators... Private, GA, RPT, Military, B52's, Mirage etc. One of the RAAF controllers back then is now the EGM ATC at AirServices and certainly would know all the issues.