Maybe they are right, but it seems like when you liberally apply throttle, that it will rotate the pinion up even higher, and vibrate its a$$ off. My shackle flip caused that, it didnt vibrate at cruise, but when i heavily applied throttle it twisted it up further than normal and instantly went into Harley mode, could feel it through the steering wheel.
I ended up setting mine 2* down lower, seemed to do the ticket. No matter how hard I stomped on the gas on the road, never vibrated, and then the 10.5in FF exploded instead.
EDIT. Looking forward to your BB15 experience in your Burb, I probably keep the closest eye on your build on CK5 as its very similar to mine. Almost everything you have done I can relate directly too, and love the direction you took the buld. So I basically use you as my guinea pig of sorts, because I would love to do BB16 or 17. Its a drive, but if your Burb fares well out there, then mine will be fine. Your much more particular about your body lines than I am. Keep up the good work, Im excited to see this big girl in action out there with all the more extreme wheelers.