That's a fine rack. Very simple design. It's a good option to lots of full length racks for twice the price.
Now about the OP's question, it's a good one and worth an answer. Is the notch around the fin antennae required because of reception interference or just to physically, spacially miss it?
I mean, who uses Sirus xM radio anyway? For a monthly fee of what, $10, you can get radio reception from a satellite. Most urban dwellers don't need it and my favorite station, KPPC, NPR is mostly mono anyway. If you live in Siberia or the Aussie outback you might want it to get the best R&R. :drum:
We're forced to live with this fin antennae on the roof for something 95% of us will never use or pay for. So we have to notch the best roof racks to fit it.
I say a cut-off saw and some bondo are the solution. :focus: