Need help identifying sigma slots

[biscuitttt]

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

[biscuitttt]

I found out my machine is a sg150 found a coin comparitor that that seems to be the right one so far. the machine does not have a bill validator. it was missing when I got it and can't find a replacement.. I reset the machine ,when it starts it go through the cycle then I get an error bill cassette door open, which I don't have the bill cassette. do I need the BV and the cassette for the machine to work or is there any way possible to bypass it. I am starting to come to the conclusion that I may have pick the wrong machine for a project. finding someone with parts is almost impossible. any helpful info is appreciated 

[biscuitttt]

 I think im getting closer. from reading another post information , I think I got around the  BV. now I have no errors and its telling me to incert coins ,but when I do incert they go through the comparator and optics then straight to the hopper and nothing happens. seems close but now im out of ideas...HELP