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#68187
frankr
Participant

    OK, I threaded bolts into two of the Fleetwin’s holes and measured the distance between them with a caliper, and using that info made a CAD drawing.
    Long story short, I came up with a bolt circle of 1.628". Attribute the error to measuring and exact bolt diameters, I conclude it is a 1.625" bolt circle (1-5/8"). Whew!