I've made a bunch of these for buddies using a similar jig. I can't say they're perfect as anything made by hand requiring precision can be difficult, but so far they do work great. I do end up with one every now and then that just doesn't work well. Noticeably poorer performance. I just chalk it up to misalignment or poor soldering. However, for the cost I just junk them. I really would like to see more refinement of this type of antenna, if possible as they do work fantastic and are so cheap to produce.