It appears Canon has solved the banding issue? 6D!

I think David is right. A sensor is not an enormously complicated device, and Canon would nave access to the drivers from both suppliers TI for the DIGIC and Sony for the sensor. It's unbelievable that if Canon decided tom purchase from Sony, Sony wouldn't put in a huge effort closing the sale. Moreover, the list of companies that has easily and seamlessly integrated Exmor sensors is large. Sony, Nikon, Pentax (Hoya), Ricoh, Leica, Olympus, Fujifilm, Epson. It's hard to credit that Canon can't do what they all have done.

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Bob