I bought an 2003 cr 960 last year. Wow, what a change from a 1688! Anyway, I had trouble with tough straw bridging over the chopper and then plugging the whole back end rotors to spreaders up. I noticed on the newer machines there is a short conveyor (PDS) to eliminate this problem. Does anyone know if one can be installed or added to mine? Dealer has been " looking into it" since December. Not too many of these machines around here so any help is appreciated.