John Deere gives a sealkit to all the dealers to fix their grainloss problems form last year. You have to take the chaffer, sieve and the frames out of the back of the combine and add several pieces of rubber and metal to it. In adition we, for ourselves, hardsurface the fountain-, clean grain- and vertical unloading auger, the threshing bars, tines, feed accelerator, accelerator bottom, feeder seal door, elefant ears and rebuild the feederhouse bottom. Just to make it last longer.