I tried out my Gleaner K for the first time today, it was the first time I've used a combine so I was sure I would have some questions. The guy I got this from picked 2 acres with it last fall and it did good, nothing was changed since he picked with it but when I went through some my corn today it wasn't shelling off all the kernels, some cobs it did, most it didn't. I have the cylinder and fan speed set at 5, i tried to increase the cylinder speed but the lever won't move for some reason. i have no clue how many concave bars are in it, I've not opened it up to see, i still don't understand all the concave system