Sorry cherokee but for someone who is a cad technician and you are measuring with a tape measure. You should know that is a no bueno. Plus don't you folks in Canada use the metric system. lol If you want to find the correct stud spacing you need to measure across like an x between 2 studs center to center or inside edge of one hole to outside edge of the other hole and it will give you the stud spacing. Yamaha measures in mm also and 4x156 is the pattern blasters use. Meaning 4 studs at 156mm apart cross wise.