I am setting up a bike with a rack and fenders for loaded touring. As far as I can tell you need to use the same fastener screw for both the rack legs and the fender supports. I don't like it because by all reports the 5 mm fastener has a tendency to shear, and the eyelets of my rack supports being just bent wire will likely add additional uneven stress on the fastener head.

What do you lace first with the fastener the rack leg or the fender supports?

This must be an FAQ, but a search or rack and fenders gives me too many strings to search through.

Any suggestions?