So, I'm about to go on a trip and we wanted to bring the canoe. My new car doesn't have the side rails to put cross bars on, but after a little digging, I found out that it has built in holes ready for putting on a roof rack. I don't like paying a ton of money for stuff, so my question is: can I not just bolt a couple of 2x4s to the roof using washers to elevate it over the contours of my roof?

The plan in my head so far is to cut two pieces of wood that are a little over 3' long, and drill a hole through at the right spots, and use the holes on my car to bolt those suckers on.

I'm planning on putting the canoe on, then running ratchet straps through the inside of my car, so the canoe itself is strapped to my roof and not the Red Green ass roof rack. The boards are more for support so the canoe doesn't slip around.

Someone let me know if this is a bad idea.