Exactly how I roll. American Adventure Labs makes gazelle specific roof rack mounts. Rounded to the contours of the bag and gives you a great spot to secure them down with a camstrap. Here's them (unloaded) on the roof of my truck.
I'm sure its fine for the money. At the end of the day, you're paying for durability, so there's no video out that's going to tell you how reliable its going to be in the long run.
I love my ARB dual compressor paired with the Morrflate controller. I'd do it again 10 times over. And I say that as someone with a Wolfbox Dual Compressor sitting on on a shelf in my garage, because it didn't measure up to my ARB.
With that said, its a "just ok" unit that does the job. But...
Wolfbox marketing meetings probably go a lot like this:
"How do we make it sound more powerful?"
"Add Mega."
"What if that's not enough?"
"Add Hyper."
"What if that's STILL not enough?"
"Add Super"
"What if that STILL doesn't cut it?"
"Put a number after it."
So now we've got:
HyperFlow 60D...