That is an excellent idea, to organize the "how to"'s
I would love for us to have more.

Just for clarification, I'm sure this is what you meant, but moving the sound-post changes the tone, power, and action (response speed). The intonation is not affected in the process.

A tighter soundpost causes the instrument to have more power while a lighter set soundpost allows the instrument to vibrate more freely which results in faster action. Different violins require different pressures. Problem is that you can't affect how hard the soundpost is set without changing the position outwards or inwards, which means that you must sometimes make a new, slightly longer soundpost if you both want more power and a darker sound. And of course vise versa if you want a brighter sound and faster action (simply shorten the existing soundpost). Takes practice and experience to make and adjust the perfect post.
The posts must match up perfectly on the top and bottom and the grains should run perpendicular to the grains on the top of the violin. In most cases, posts with more grains are preferable.

I made another one but the cap I was wearing while making it had salt marks from me wearing it after swimming in the ocean and I didn't notice that until afterwards. I can upload it and make it unlisted if you are interested in making your own sound-post.

Everything that I learned came from great luthiers. This doesn't mean that I don't make mistakes or that I have the best methods. Take this guide with a grain of salt.