Originally Posted by
pallen
If you look at the picture 10000degrees posted, you'll notice there is a metal fin also welded to the fork for additional strength that goes up the fork a bit. I have no idea if that is enough reinforcement, or how that would affect ride quality of the fork, but it looks like he is on the right track by not simply welding on eyelets.
My Nashbar rigid front fork with both disc and v-brake mounts also has a similar reinforcement running vertically up the fork from the caliper bracket, for the same purpose. I think that design is pretty much universal for forks designed to take disc brakes. That pic posted of the bent fork was obviously a very poor design and a failure waiting to (that did) happen.