So, first off I prefer stimulant nootropics but I will not use yohimbine or massive doses of caffeine. Addie Up by Red Dawn is fantastic, but a bit expensive. It looks like Attention Link by HTP is very similar though lacking the list of phenethylamines usually associated with their listed extracts. Anyone used both? How about Adderex SR or stacking Adderex and Attention Link. Seems like hordenine is necessary for the amphetamine analogs to really kick in. Is that actually true?