Had a thought and want others opinion. This is on a R62 with CDF. Just bought a high wire concave. My old one was a low wire with every other wire removed. Don't do much small grain but have done some and plan on doing some this year. With my old concave I just made my own filler bars with flat bar but with this high wire the filler bars will be almost flush with concave bar. It won't do much thrashing like that. I found a piece of F2 channel concave and with a slight grinding it will fit between the bars to work as fillers and still have an edge to thrash. The thing is if I run 3 the first few rows will be closer clearance because the F2 concave will stick slightly above the existing concave bars. I'm thinking it will work ok by adjusting front of concave down some. They won't all be even but it will still be better than the first 3 bars being flush. What are your thoughts on this?