When the bigger roller in the unit wears out, the top of the paper won't align with the top of the scan. Or even worse, it will be a diagonal. Looks like putting electrical tape on the edges of the big roller compensates for this. Although, I used what claimed to be rubber electrical tape on the edges of the big driven wheel. If you put it in the middle, it doesn't seem to help. This was inspired by a video on youtube where someone used electrical tape on the rollers.

Roller: http://www.extraparts.com/panasonic...

Seemed like normal vinyl electrical tape: https://www.ebay.com/itm/Self-Fusin...

Update:

Stopped working after it "cooled-off". I give up, I'm buying a roller set off ebay.