Phrasty, you can make a serviceable version of alkaline noodles, by cooking the baking soda at 250F for one hour. I make it one cup at a time, and you can store it indefinitely. This is a form of Kansui, although real kansui is better, it is much harder to find. Using this, the basic ramen noodle recipe, will have all the characteristics of Japanese ramen, or Chinese West Lake noodles.
Why would you do this? Well, because once you can get a kansui noodle to work, and it is considerably harder than egg noodles to get right, you can make thin noodles that will not get soft or break down in the very hot broth favored for ramen. The noodles most folks are familiar with are a far cry from the real thing.
As to the Tonkotsu, the milky broth that is boiled hard, that is the real deal. The stock you made, sure looks great, and is probably a great Asian noodle stock base. I bet it would be great for Pho or Won Ton soup. Tonkotsu is rarely made correctly in the US. It should be slightly thick, almost white and opaque. When made correctly, the bones will almost crumble when removed from the stock. It is extremely rich and it coats the mouth when you eat it. Try this, take a pork neck and shoulder, add in the ribs and boil for 3 o 4 hours, hard boil, until the stock turns milky white. Remove the bones, and reduce by about 1/4. Then turn off heat, add in some seaweed and let it steep. That will be an amazing stock.