I have an MF128 hay baler, my problem is the metering arm which runs on a knurled roller keeps slipping when material is not going thru the baler. Why MF did not use gear on gear like JD I don't know. I have replaced the arm the roller checked clearances tried driving slow/fast but that constant plunger pounding espicially on turns the meter arm just vibrates down. To sum this up can this be converted to a JD style bale length metering system or does somebody got some ideas?