There is an online tool that does the same calculations. I used every-six-days dosing for months and it worked fine. I tried every three days for two weeks but ended up too nauseous.
I spent some time in a spreadsheet and wanted to post the comparison for anyone interested. I built a simple formula that takes the previous day's level and multiplies it by 0.5 raised to the power of days elapsed divided by six. That produces the expected decay. I then laid out two 45-day calendars: one with 1 mg every three days and another matching the trial's 2 mg weekly start. The every-three-day version shows noticeably smaller swings between high and low points.