Is surly drawing attention to the fact there aren't mid fork brazeons. The eyelet ones should be as strong as any other.

What I most prefer is to build the fender eyelets into the rack. But barring that, I braze the support rods to a small tag of flat plate, and then I place that on the eyelet side, and bolt the rack to the outside of it. The result is strong bearing and good lines for everything. I use a piece of metal about 1/8" thick and the size of a stamp.

If you put the fenders on the outside, fender loops are not strong enough for the bolts to properly hold the fenders in place. Or in some cases the bearing on the rack outside is not stable enough. Of course it all works, but if you want to get into it, those are the potential issues.