Yeah parts issues are always a touchy subject. Mainly because of the moral issue of how long machines should be kept running. Some companies like the ones who make a lot of capital can cycle their machine inventory fairly often so they can sell the old equipment, even if it isnt fully worn out, to some other company. On the other hand, you have companies that dont make as much money as these huge companies and they usually run their machines into the ground because they cant afford to keep buying new machines, or they buy the used machines from those big companies looking to sell the slightly used machines. Either way the smaller companies then need parts more often and sometimes the OEMs dont have the parts because they only make new machines. Its a tough situation =/