Hi Ginner,
Excellent suggestion indeed. I have purchased and put together this kit (It really is a kit...) and it comes out as advertized. I have flown it with my F450 and Gopro2, and, eventhough operational, I could feel that I was reaching the maximum capabilities of my Quad. It fits like a glove on a F550. It is really sturdy, easy to repair if needed, and only require minor sanding adjustment during assembly. It is in fact design this way allowing each builder to precisely fine tune the kit to his rig. In the meantime, you could always use plastic tie-strap to hold legs extentions (wood dowels) to allow you to use the F550 with Gopro while awaiting for you X-468. That is what I did, works fine!