#bikinigirl24.... I took a similar approach to yourself by not playing easy tees. But, I did play a bunch of custom courses in order to level up and unlock better equipment.
ranked rounds can be deceiving... my ranked round total was over 2000 rounds and I still had not hit saturation because of all the custom courses I played to level up... with the help of another wgt member, I ended up crunching numbers, extracting rounds played and plugged into a spreadsheet to get a rough estimate of how many ranked rounds I had played that count towards my average... it was tedious but it can be done. it ties into some of the other insights already offered by others
I am out of town at the moment, but if you genuinely are interested and would like some help, let me know. The key is having a specific average on a set date to work from and then compare that with another day possibly a month or so later with while incorporating all the ranked rounds you played over that time frame.
I also noticed at one point, for some reason every so often mobile platform will give a very detailed wgt average out to 3 or 4 places after the decimal, otherwise your pc average is always rounded up or down, hence it can appear to drop more or less depending on which way the number is being rounded off.
Anyway, the more information you know and have can dramatically helped me narrow down my estimate and I eventually predicted fairly closely when I would reach saturation.
Another advantage I had, our CC generates monthly stats with your average at the end of each month... this gave me a set date and time for me to track ranked rounds from. You then go into your scoring history and copy and paste all your rounds into an excel spreadsheet and you have a tone of data to work with. of course you need to extract all the rounds that do not count towards your wGT average.
It is a little like finding X where you know all the other variables and then plugging in a few numbers into a spreadsheet until you see the lowest margin of error.