I have the rigid 40" light bar and a soft top. It was originally installed with the short mounts from the dealer - but the soft top flapped horribly. Even with the diffuser on it. Super loud, super distracting and really awful.
I moved it to the higher mounts ( which are meant for the soft top ). The flapping completely went away. There is still; however, a humming / buzzing at higher speeds ( 65+ mph ). But it's not as bad as the flapping, by a long shot.
Haven't taken a long road trip with it yet on the new mounts to see how it is after a few hours. Will relay the experience once I do.
2021 Race Red Wildtrak
Love it.