Order .8 mil for best fit. The second version of my genesis rgb bypass board now no need for a jumper for hd retrovision cables but if using them you need to remove resistor r 71 from bottom of board near the multiout connector. If using mono audio and hd retrovision cables its possible to have a 3 wire install just fill holes ma and cv along with 5v(that one always gets filled 5volts). To use csync only fill 5v and ma if mono audio or only 5v and wire sl sr if using stereo audio from the headphone jack. or you can fill cv and wire csync if you plan on changing from hd retrovision to scart at some point.