I made a large batch of STB tape today. About 4 metres long, double width. I varied the formula to include more of the powerful ingredients, plus two ingredients which I have not used for a long time. The result was by far the most powerful mixture yet. I estimate the new mixture is 3 times as powerful as standard STB. I call this new mixture STB Gold. I put one third of a layer on the wand, and it blew me away. The one third layer of STB gold was more powerful than the last 2 complete layers of standard STB. WAY more powerful. The problem is, I don't really know if it is the 2 new ingredients, or if it is the high concentration of powerful standard ingredients. The earlier mix also had a pretty high concentration, so I'm tending to favour the new ingredient theory. After taking this photo I covered the other two thirds of the wand, and the results are savage. Really aggressive and powerful, but not harsh. Just more of everything, obviously more on every record. Kick drums are actually aggresively banging on the wall behind the speakers, with super-realism and realistic size. Or you could say the wall doesn't exist any more. (The Alpha card is just a test, it's good but doesn't need to be there)
The gold color is because of the inclusion of rutile in the formula, but I suspect it's really the other new ingredient that is responsible for the power increase.