the 2388 mods are due out in april for wheaters. new air drum which is plastic. some other improvements and parts to go with it. holes are .027 . which is smaller than the metal large holer. they will still have a small hole one also, but not to be used where it is real hot, because engine will heat up. hopefully will cure problem. the problem of breaking rotor belts has been addressed also. the ramp on the torque sensor is being changed back to a 54 degree from a 64 degree ramp. the rollers couldn't crawl ramp fast enough and would create belt whip on non drive side on heavy loads. have to disassemble honey comb air intake and clean and put back together so the air cleaner doesn't get near as dirty. too much trash got into them last year and would not let dust aspirator to work and clean air before going into air cleaner. the above is the mod. FYI there is now a orifice fitting to put in the feeder house cylinder so you do not have to slow down combine to kick feeder house in. sone of the broken shafts in corn and platforms could be due to this.