Hi. I had this problem but it didn’t completely fix my issues. Issue 1: Yes. The white plastic thing was bust and I was able to fix so thanks for that. Issue 2: The paper would feed but only if there were only a few sheet in the tray. If the tray was full it wouldn’t feed. Without going through all the diagnosis the: Answer is: there are two feed rollers that are on the printer (not the tray). Remove the rollers (it is do-doable just figure out how it’s all clipped together). Remove the grey rubber from each roller. Wrap about 10 cm of sellotape on the plastic rollers then put the rubber things back on. Issue seam to be that the grey rubber things have worn down a bit and their thickness isn’t quite as much as it should be.
Both my strips broke at about 5-10 cm of pulling. Heart sank. I repeated the following: heat from hair dyer for about 1 min until the case was hot to touch, IKEA card edge to pry the battery along its length, reheating when the case cooled. Moved onto a stiffer/ thicker credit card type item once I could get it under the battery. Took me about 20-25 mins but with new confidence it could easily be done in 10 minute; I erred on caution since first time. I just used two 3 mm wide strip of double sided tape to secure the battery. Once i removed the film I heated up the case once again the soften the new adhesive before placing the battery. Working fine.