I created an FTF list on the geocaching.com website. This gets used by Project-GC as a cross reference. There is also a checker for caches that you have found on the same day as they were hidden. This can quickly help you confirm if you were FTF or not on a given find. You can then add the GC code to your FTF list and Project-GC will use this list to help update your FTFs.