Like GaleForce said, the Berk combo does sound awesome.
It sounds like a really pissed off Racing Chewbacca above 4k rpm and like a burbling, slightly cantankerous Chewbacca in normal city driving.
I did have an issue with the tips not being totally straight. Nobody else I pointed it out to could see what I was talking about
. But it was a simple fix to get them perfectly aligned.