The big fat ugly heavy stock muffler works just fine.....has never caused me a problem yet in weight & balance or performance-wise, so its staying.
But you got to do whatever helps you sleep better at night. It's the most important thing of all, I've learned. Personally, my F800 investment has surpassed $19,000 now.
And, I was sleeping like a baby.....until this post!
HF.