gunner, We cut quite alot of canola over here in England, and in my opinion you have got the best combine for the job!! We spray ours off and fit a side knife to the header, when opening up a breed we run the divider in the sprayer tramlines. Have also picked up swaths with no trouble.Can't tell you much about header settings as we have the European 1030 header but we don't alter anything except sometimes take off the stone protectors behind the knife. You want the drum at the bottom of the feeder to be able to move right up. The concave is set so it is just narrower than the slotted grates-at least about 4 on the indicator. We run a full set so small wire concaves with no covers. The rotor is about 550-600 on a 1680 speciality so I would think a 1660 would be a bit faster. Fan at about 500, bottom sieve fully closed-it still gets through the holes. Top sieve just under half an inch, if it is too wide your tailings will blow off. Also switch your grain monitor off as it can't detect such small graind amoungst all that chaff.One other thing don't try and bale the straw, you can chop it with the stationary blades fully retracted it is that brittle. E mail me if you want any more details. - Paul