Have ridden many metrics on my fg and many of those have been back to back to back and many full centuries on the fg with a fair amount of gear and would say that if you are packing a lot of gear having a few extra gears is a good thing... especially if it has been a while since you did this.

A few years ago I was riding at a 16,000 km a year pace which was an average of 60km a day and I rode a great deal more through the spring, summer, and fall while my winter riding was pretty much limited to my commute which was 30km a day.

Ride this much and getting on the fg for 100 km or 160km is not nearly as big a deal and more than half of my riding was done on a fg during this time.

Now my health forces me to ride with a few more gears and my fg time is more limited but in a good day I could go out and knock down a small c or a big C.