I have a 2004 5710 series II 64 feet with a 5440 tank with cab rate adjust (CRA) and twin 1200 NH3 tanks and have 12.6 inch spacings with 3.5 steel packers, my mid row banders are shanks not the colters,from my on farm testing a bearing and a disk gave me nothing but trouble after 15000 acres the shank has seeded over 12000 now and have had no trouble at all,I have ran dry 46-0-0 and nh3 with this unit and it works great,my wheat protein for the last 2 years have been over 15 and yeilds are still the same as when I conventional tilled,as for openers i run a 3_4 inch on the seed shanks and a 3_4 inch on the bander shanks,but this opener is diff from my seed opener as it puts the fertilizer 1 inch below the seed bed.I have put down over 400lBS of seed,fert(46-0-0),and starter fert(11-52-0) and have had no problem(I run dual fans and a dickey john NH3 kit),as for what I do not like on the drill is my packer choice,this winter I will be switching to the 4 1_2 rubber wheel as I feel my field will be smoother with this choice.This drill is the 4th seeding tool on my farm and they all have been bougault.If you have any IJ just e-mail me.