Yes, Les, a 660 is a class 6.  I'm led to believe, by people who run them, that it's a large class 6 and will significantly outperform a 9600, but I don't know that....the other night we were running across the road from 9750s and from talking on the phone it sounded like we were running more through the 9600s then they were the STS in that particular set of conditions.

That's all kind of irrellevant though, because I'm talking abot a 670, not a 660.  A 670 is solidly class 7...350 hp and a bigger rotor then the Deere.