I'm very jealous lol - Been after one of these locally for a while now, I used to have one with the autosense and permabag but it packed up long ago and was thrown out. The permabag got blocked and the motor overheated. You must make sure that the permabag gets washed properly in water, or it will not allow sufficient airflow.
The TP Permabag was really the bagless predecessor to the Dust Manager, and like the Dust Manager needs its filters cleaning, it needs regular cleaning to the permabag.
The best feature of the TP2 was the Autosense - I loved to see the lights change colour when it came across dirt. It has a small microphone on the inlet to the bag housing, that senses dirt passing by it, so speeding up the motor.