How little things have changed in 2 years.
This was one solution mentioned on another thread using a sheet of plastic
I managed a couple of weeks ago to remove some paper from a Canon printer (different model) with a pair of tweezers (with the power off) and there was no more than 2 or 3mm showing. It was painstaking work, but patience paid off and it now works perfectly again. I did have to remove the ink cartridges for easier access. The trick is not to pull too hard and tear the paper.