I know this isn't exactly what you asked about but I'm using the same combo on my F6B as I did on the Valk. I have an Omni Cruise throttle holder as well as a KuryAkyn universal throttle boss. With those two things, I can ride pretty much as far as I want without any discomfort. Most of the time I even forget about the Omni Cruise because I'm so comfortable with the throttle boss. I can easily ride out a tank of fuel on the Super Slab if I have to, but that's not my preferred method of travel. I find that the Omni Cruise works better on the B than the Valk because the extra torque handles the ups & downs in the road better.