My Canon Pixma Pro prints perfectly on smaller print sizes e.g. 4 x 6", 5 x 7" etc, however when I print A4 / Letter sizes, everything appears normally until the final 1 inch of printing when it makes noises (slippage ??) and page starts to feed crocked and smears this final inch. Feed rollers all appear clean and I have tried all the cleaning options. I did notice a build up of ink on left hand side sponge soakage pads underneath. I soaked this up with some tissue and have got a slight improvement but still have banding on last 1 inch. Any suggestions. See a sample print attached.