There is also that old saying, "Never buy the A model of anything".
Probably true.
I did fly for Scandinavian Airline System when we got our first B737 ng's with DAC. (Go google it)
Joined Braaathens shortly afterwords an the CFM 56 on the NG was running just fine, no vibrations, no egt limitations no nothing.
As i understand things SAS was the launch customer for DAC on the B737.
Edit to add: Maybe Bjørn Kjos is caught up in that A - trap
