And I am back!
Here's the problem with the Satellite antenna and the sharkfin antenna... the base is too wide for the shark fin to sit properly. The directions state that the back of the antenna base should be at least 1 inch away from the back of the shark fin. Problem is... you don't have that much room to work with (yeah, not even an inch).
What I ended up doing is lying out the shark fin as CLOSE to the base of the antenna as possible without touching it (we're talking less than 1/8" here). Then I taped out my guiding lines and stuck the shark fin on. The directions say to apply pressure for about 1 minute, but I did 2 just to play it safe.
Here's the problem that VG fails to tell you in their instructions... you're supposed to keep the car out of the rain for at LEAST a few hours. Why? Because the adhesive needs time to adhere properly. Also, the base of the shark fin is FLAT whereas our rooftop is CURVED. The adhesive gasket isn't thick enough to overcome the curvature of the roof, so you might have issues with the back lifting off.
It's a really nice touch to the car, but at times, not really worth the headache. I think I forgot to securely screw in the antenna base before applying the adhesive and now my radio tends to have static in some areas.