I want to add mid fork braze-ons onto my mtn bike but so far have come across 2 standards: Tubus says 165mm and Nitto says 180mm. Even tho they don't agree with one another about the location they at least measure from the same point: the rear eyelet. So . . . where do I put them?

The bike is stripped down ready for bead blasting and powder coating and I will be having the braze-ons added between.