I pull out filled pages and file them often. My Filofax fill up fast...I keep so many on going project notes in it:)
If "adding and removing single pages" counts as a tweak I do it all the time :) I have the pad in the back of my Malden and am always creating new pages and filing them into the planner, plus once a week or so I go through and remove the past to prevent it getting too stuffed :)
This year I designed one week insert for my Franklin pocket binder instead of several ones last year. When buying inserts I did not favor the paper, font, or placement of the days. I prefer the large space on each day of my format. In outdoor meetings without chairs or a table I can write information as the binder remains open on one hand. A larger binder or small sections on the insert would be inconvenient in those meetings.
At the beginning of May I moved out of my VDS A5 and into a new custom VDS A6. This required a complete retooling of what and how much I keep in my planner. My new setup lacks an A to Z file so I just file everything, including contacts, alphabetically in my new "Information" section. I keep three months (past month, current month, next month) of Do1P inserts, plus monthly calendar pages in my "Diary" section. I have a "Notes In" section that I use for brain dumps, notes, shopping lists, whatever. I am a project manager at work. I used to have detailed project tracking in my A5 but have been transitioning to a project management information system (PMIS) using SharePoint. Now I just track the high level details using the DIYFish "vCarie" planning pages. On Monday mornings I go through my A6 and remove pages that are no longer relevant and do any necessary "filing" in my Information section. At the beginning of each month, I remove and store the "last month" pages and add the "next month" pages. I keep all of the calendar pages as those have the important stuff such as meetings, events, and date specific reminders.The migration to the A6 showed me that yes, I could downsize and still have retain a tremendous amount of functionality.
I set myself up in a Classic-size Franklin planner in January, and have not made any changes to the setup since. Once a month, I rotate out the oldest daily pages and new ones in, and weekly I review the past week and plan the coming week. I just did a page-by-page flip-through this week to clear out obsolete items because the planner was becoming difficult to close. I really like the classic size because in addition to being a planner and reference book, my binder serves as a kind of portable inbox for all manner of items needing action; bills, documents to file/scan/photocopy, checks to deposit at the bank, etc. They all fit in the big planner so easily. Surprisingly, I also find I really like having a zip binder because everything is so secure. It is not nearly as annoying to open and close as I had thought it would be. Very pleased with how this set up is working for me!
I have also made a change earlier in the year from pocket to personal. I am trying to keep it simple and use only what i need. There are so many videos and blogs out there and I get a lot of self doubt about things from them. Using the 6 tabs from Filofax I tried to organise everything into those. I soon decided that just using a-z and filing under a letter was much easier and more efficient. Its been working great! I second what Josh said about the zipped binder - it's much better than I predicted!
I change always something little. Because I make my own inserts it is not a big deal, I migh change only something on my weekly insert, or on the daily... Sometimes I change something bigger - last time I printed out a whole year Agendia weekly insert, because I was sure I will use them. Then I found something different out :D But I am since September in the same binder! This is a big step for me.