Hello everyone and thanks for the very useful guide. My Mg3650 has a paper loading problem, that is, sometimes it is unable to take it, other times it takes it a little crookedly and the paper gets stuck inside the printer... I noticed that the trolley with the two rubberized wheels which is used for pulling the paper in, it doesn't put enough pressure on the paper because I think it has a broken spring... before opening the printer following the guide, can anyone tell me if it is possible to replace or repair the spring? Maybe it's just unhooked but I'll only know when I open it. I'm wondering if any of you have had the same experience. Thank you!