I'll have to say that your problems are not uncommon--------but putting them in perspective you have the lowest maintenance combine out there. I speak with some authority and lots of experience.I have owned some 11or 12 TR's since 1978. I also have owned and or operated JD's CIH, Gleaners, and even Massey's. We farm in Ill. and I have custom small grain operation. I have been putting 500-700 hours on each combine a year since 1992. You should be seeing some improvement as the newer models come out. Hyd. lines are not a common thing, Steel line mountings and bends have been improved,electrical switches and wiring can be a pain, and belts are really long lived unless something goes wronglike rotors slugged, belt w_spring tension not tight enough. Mice are absolutely the biggest problem with all combines. Ask a Deere man what average maintenancecosts are! They are at least 4 times higher than a TR. Remember TR's have some 100 less moving parts than a Deere for example. Stone traps are for your combines protection against rock ingestion. Believe me insurance companies pay a lot more losses onThe other models than on TR's. Electronic stone traps are very sensitive so if you have one it may be your problem. The TR-98's have an easy adjustment for the trap door floorheight. Also newer models have quite abit more power so you need the rock roller raised up more to accomodate the increase in material going in. Big overal problem is that many dealers don't have a serviceman with much experience. I call harvest support most of the time. I say count your blessings. Believe me you could be much worse off. Remember too that the Genesis engine in the 98's and 99's. is the MOST FUEl EFFECIENT and dependable engine on the market. I hope this helps your confidence. Give a call or e-mail if yu have more specific questions that I might could help with. 815-341-5101