Fred, yours has the Anthrastat right? I think all AA130's have that. I am taking it they are the same thing, or do the same sort of job in a way. When (i should't say this but i am a spy) i was down at the Axeman Anderson building picking up my parts, i was waiting in the office. As the guy was looking up my order, i peered over the counter and was looking at a handful of orders for Anthrastats and calibration receipts. Maybe they do go out of whack somewhat and that is why the AHS uses a slightly different setup. When i first got my unit running, i thought, boy, could this unit really use some computer control and various updates, maybe a project for the future. But, it runs fine as it is. It's like driving a older car with a carburetor, manual transmission, 4 wheel drum brakes, etc.etc. They often do their job very well, keep up the maintenance and learn how it works and you won't have any problems. On the other hand, i often thought if the AA130 had separated the fan drive and the auger drive it might be a little different running. But, often less moving parts, or less parts altogether often make a better unit. Maybe not the most efficient but rather trustworthy. I used to work on a radar at Tobyhanna army depot, it was from the 70's, still used today, had a range of 300 miles and i myself had to test the transmitter section up to 3 megawatts into a dummy load. When i asked a few people why do they still use this old radar? I was told, because it works.