I've owned 2 Monsters and tail chopped both with no regrets. It's just the right thing to do...looks so much better. But if I had a do-over I'd get the DP short tail instead...I miss having an extra place to strap luggage and the stubby carbon tail piece looks excellent.
I can believe 6 lbs if you factor in the beer tray and turn signals. In fact I can weigh all that stuff tomorrow just to make it official.
I have 2 tail sections available if anyone needs one btw. One Ducati Dark one silver.