Well, on the swishing around... if you have the condensor out that is the best way to get the flush and stuff out... being able to use gravity to help get all the stuff out... but that is a lot more work and I believe that the proper flush fluid pushed through with nitrogen will get the job done if done enough times... Warning... you really have to have the pressure side of your nitrogen regulator valves ( need to the two valve regulator system.. in fact there is one designed for flushing ... I think that 3 to 5 lbs max should be used for blowing the fluid out...
I am not familiar with that brand compressor....