I looked into getting my pair professionally altered for the same reason, but none of the seamstresses I found would touch them. I'm very interested to hear how chindits handled the zipper issue...seems like it would require some sort of new "stopper" on the end of the leg zipper after you cut off the bottom of the legs. For my solution, I just unzipped the pants about 4 inches from the bottom, then folded the bottom 4" of material inside the pants. Then I used the strongest duct/gorilla tape I could find to keep the bottom of the pants folded up inside. Last I warm ironed the new crease at the bottom of the pants (4" up from where it used to be) to make them sit on my boots nicer. The zipper works just like before, but I only bring it down as far as the new crease at the bottom. Hope that helps, if you need pics let me know.