Since the CAB-1L transmits on a different frequency than the old CAB-1 and the Powermaster listens to CAB-1 frequency, you will either need a "Powermaster bridge" or have to buy a new Powermaster.
The new Powermaster is full of new features, has greater power handling capacity, and controls some functions of MTH Proto two and Proto three in conventional mode. The new Powermaster has the features of the discontinued TPC.
Are there any other components that should be mentioned?