I have an AMP MATE that I purchased off of SH forum. At any rate its a slightly earlier version and the previous owner had the updated parts sent to him (step motor and a sensor board). I installed the stuck case switch other than that it seems changing out other parts would require disassembly of the unit did anyone do that ? I wonder the best way to proceed or should I even bother. I would also need the updated ramp that I dont have etc. to be worth opening the unit... I have not tested it with the annealer during annealing yet so..... I am not sure if I should even install the parts if it works just fine.