Well, the larger the amount of filler, the more stable things will be for you day to day. Since your other post is concerned about getting comfortable about getting too much or too little Ativan, I do not recommend using less filler.
Also in your other post, question 1, after 3 months you could use the same formulation (24 pills in 30.8g). To compute how much of the mixture for a dose, use this equation:
weigh on scale = dose * 0.4/0.15
You might need me to change the mixture for you when you get near the end of your taper.
As for you last question, yes, you can continue to file. Whenever you want to use the mixture, just use the equation I gave you above.
Remember, anxiety is the beast in all of this. If you worry too much about your methods, the anxiety will make things worse. Learn non-benzo methods to control anxiety (search on youtube). Try to take you mind off the taper. Live in the moment. Do not worry about the future or doing all this exact correct. Benzos stay in the blood a long time so if you get a little more or less one day, it will average out. Try to find peace or the anxiety will make things worse.