For now I will answer the specific questions. The tutorial will come from the next version because there are several things I need to change to make it easier to make and more functional.
The click mechanism has a lip on it that has the plastic clip attached. I sand the lip and clip off completely so the the click mech. barrel is smooth. There are no brass tubes. The click mech. is glued into a "J" size hole in the upper end before the wood clip, finial and push button are glued in place. This 3 piece set up and using CA in close tolerances is one thing I hope to change.
As for the tip, I have made several wood tips and find that it is best to drill the larger hole to the proper depth then turn the barrel and tip as one piece. Finish it normally (CA is my choice). Then drill the small hole from the outside using a drill chuck in the lathe. I put the drill bit into the dent made by the live center, that makes sure the hole is in the center on the outside (where you see it).
I strengthen the tip with CA and then sometimes have to clean out the hole a little with a needle file.
I did write up a step by step proceedure, but it is very long and has no pictures. If anyone wants a copy I will email it to you, but I would recomend waiting for version 2 with pictures ;-)