HI I'm new to the forum...I just purchased 2 sigma slots they suppose to have came from a casino when they up graded their machines.they have been sitting in a warehouse for a few years but they are clean inside and out.I got them home plug them up both light up both went through start up cycle.and then both had the same error ( hopper runaway )..open both machines to find that the coin comparitors were missing from both machines and the coin optic missing from one. . not sure what machine i have . the plate say model name - std chop top, and the model # us00001..it looked similar to a sg 300 so I purchased 2 used cc16 25 cent comparitors ,they are not the right ones. The plug for the comparitor in my machines is larger and red and still no luck finding the optic. Need help to find out what I have so hopefully I can find the parts that I need. Any help would be greatly appreciated