We have been really satisfied with the ATO power modules, have run other brands and the ATO is the most stable. They only provide 20% and actually that is all that is needed, have run some 30% modules and find they are putting things over the top, a pyro guage is a must with 30%
We put a Bullydog Torque Amp on our '02 9650STS.
At 1st we tried 10% over but went to 20% and it really handled the 635 Flexhead in soybeans nice.
We ran it at 10% when combining corn with 8 row head as this was more than adequate.
we have a 2001 9650sts that we put a bully dog chip on it, got it wiht 300hrs now it has 1200 and we have had no problems wiht the chip run it at 20% all the time, run a 12 row head on it with a big top hopper on it. very pleased wiht it. will be getting another to put on our 9670sts thats coming.