my 57cm kilo from bikesdirect came with an uncut steerer/fork, so after getting some advice and reading some tips, i took a tube cutter (aka pipe cutter) and trimmed off 1 inch, leaving 2 large spacers below where the stem clamps on. I made sure not to cut into the star nut inside of the steerer, and used a wooden dowel rod to tap it out of the fork and back into it, now cut. I also used metal-friendly sandpaper on the steerer, post-cut. It may have been easier if I had a file to smooth it out further.

before:


after: