My TR86's top chaffer was getting worn, hard to adjust, some bent and missing fingers, so I was going to get a new Loewen top sieve but was told by A&I they wouldn't have any till after harvest!So I got a replacement from the salvage yard and also came across a Harvest brand rigid Air Foil at a dealer. He said they really clean up the grain sample (which I think is really good anyway) but that you need a lot of air movement. I think the TR's are borderline on air to start with, my TR86 can only get to 1050 RPM, and my TR70 I haven't checked in a while (no digital readout). I have a neighbor with a 6600 Deere and he runs one and loves it, but had to modify the drive to get more fan speed. Are they better in beans or corn or both or should I just forget it? Also, it has no place for sidehill dividers on it, he said you'd have to make your own and weld or bolt them on.