^you might think it should be something any old machine shop could do, but here in the SF Bay Area there was nobody. I ended up sending it all across the country to Francis Bollag in Mt. Vernon, NY, who not only chucked it in a lathe and cut the threads absolutely perfectly, but he did it cheap! You want to find a machinist who has done this before (cut threads on a fork steerer using a lathe) or you could end up with an unusable fork. Chrome has to be OFF before the cutting is done, adding threads is far easier than threading a blank steerer from scratch.