Been there done that weeks ago.
I was the first person in the US to have research samples of Acetyl-L-Carnitine for commercial use. That was many many years ago. I have always been an enormous fan. (The real blessing has been watching raw materials prices come down over the last 10 or so years. It is now in the affordable range.) There were some amazing products developed with it (and other substances) years ago that never made it to market because they were not remotely cost effective.
I've been playing with different synergistic nootropic stacks for a while.
I've found that the "blocking" dose is hit very low in a synergistic stack. Hence, the nootropic benefit also seems to come in a very low range. This would be a great subject for further discussion; unfortunately, the information is so involved that it would have to be covered in a conference call rather than on internet posts.