Looking at an 05 BG 5710 w/ 5.5" pnuematic packers. Looking for info/input on how these are panning out as far as the packers/packing. Been a concord man forever so partial to the pnuematic packers. Done the due diligence/search here on the 5710. Concerns I have are the shanks breaking. I have never broken a shank before. Has this been rectified, are some years models footage etc better or worse than others? Any info is appreciated.