So my rpm is now working and very kewl, the problem w/mounting was 1) wasn't close enough, i am now about 2-3 mm from the flywheel. 2) my mod of the RPM board : had to cut the corners so i could tilt the PCB w/out hitting the engine housing. This allowed me to tilt the RPM PCB so that the entire board was behind the housing, which allowed a better view of my black dot. I think it was sticking out 1/2 way b4, not capturing the full picture. Hope this helps !!