Mark, I thought that the video "As the wood turns" highlighted the value of using CA glue to make the thread form look nice without chip out.

BTW, there isn't a lot of strength or purpose in having real "sharp" threads. If you look up the form of the US national thread specs, they don't come to points. They are trucated (slightly rounded or squared off) on both the peak and the trough. I know that the national thread specs don't apply to the threads that we put into wood and that all we are looking for are two pieces that screw together. But perhaps the logic behind the spec does have some value. I suspect that the reason for the threads being truncated is because there is little strength in the tips of the thread. Also, I suspect that threads that come to a sharp point are likely to look a little ragged (when in metal) or show chipping with wood or other brittle materials. If you want, I'll post a copy of the national thread diagram.