Thanks. I do use a similar strategy though I've only been on Adderall for about 2 years. I do take XR and treat it like a baseline. But I also have an instant that allows me to adjust. Getting better at dosing but yeah it definitely requires flexibility. I do notice it depends on lots of things like sleep, exercise, and diet. Doesn't help that human sensitivity is similar to manufacturing tolerances lol. It's hard to find the routine though as there are a lot of external forces and it doesn't help that everyone acts like they need to be done right away (I mean the big issue with ADHD is triage and prioritization). This is worse in academia than when I've worked and honestly I only went to get diagnosed because the environment made everything more difficult.

One thing I found helps is I put desiccant in my bottles and it helps maintain the quality. I do some 3d printing and so store any excess medicine with filament.