I have been running a concord 2400 air cart and a 30 foot concord tool bar for 15 years. This last spring I bought a flexi-coil 2340 air cart and a 5000HD toolbar. I haven't even used it yet and it is pissing me off. Had to replace one meter box, had a bad wiring harness, the seal between the air dam and the seed box was blown, and today the hydraulic valve on the loading auger quit working. I thought it was a good deal but I was wrong. I also really miss how easy the concord cart was to calibrate. Too many chances for me to mess up the calibration on the flexi-coil.