It's too bad you don't live closer to me. I provide several levels of spine alignment services. The full package involves you and I stripping naked to the waist and smearing ourselves in Narwhal blood, consuming Peyote, and chanting ancient Ngomambo spells over the shaft. For a few extra bucks I'll hire drummers to lead us into a deep trance. This is often worth it, though, because some of my clients have reached deep and meaningful epiphanies, such as realizing the meaning of their lives, the cause of their ungoing dissatisfaction, and/or why they keep coming over the top on their long irons. (FYI: For $500 extra, I will sprinkle pixie dust over the shaft. Yes, I know that sounds expensive, but pixies are tough to catch (a little known fact -- they bite) and turning them into dust is seriously tough on my Vitamix.)
Seriously, though, what kind of "spine finding tool" did this guy use? I'll bet almost anything that he used a ball-bearing based tool (also known as a toy), which will have located the NBP. The "spine" will be 90 degrees to that, I believe. A more meaningful approach will use a laser attached to a weight at the end of a shaft or, even better, rotating the shaft by small increments in a frequency analyzer.
Once you have established the "spine," alignment is a bit of question mark. The 3, 6, 9, or 12 o'clock positions, I believe, are based on a misunderstanding of what the shaft is doing throughout the swing and at impact. These positions assume a "buggy whip" action, which doesn't occur (and even if it did, at the swing speed of most mortals would only result in a "buggy whip" of a couple of degrees). The only way that any buggy-whipping will occur is if you have a SS over 100 mph AND (not or) you have a late/very late release. If your swing doesn't have both of these characteristics, the shaft is all but straight at impact and your spine alignment is meaningless.
I can see some merit to spine alignment, if nothing else but to give piece of mind in terms of consistency. But I think it is far, far, far down on the list of customizations that will affect most (if not all) people's swings/games/performance (FWIW, I don't do it to my own clubs and I have the ability and equipment to do it. I certainly couldn't justify charging someone for it and would probably try talking them out of it. But if they insist, what can a a guy do? Upsell them to Pixie Package. If nothing else, it's a hell of a lot of fun.)