For regular maintenance I recommend that you, after each print, clean the print tray so it becomes scraped clear of any residual material. Once the print tray is clean, you can use some  rubbing alcohol with paper and clean it.

Voila and there u have it a machine that hold x year longer than normal >)

One other thing I was going through the assembly manual for the eventorbot --> http://eventorbot.com/files/Eventorbot% … 0guide.zip and I see it has a geared stepper for the extruder.. so my post about the moire being worse for 3mm while technically true wouldn't be as bad as I first indicated but would still be 3 times worse than 1.75mm filament.

I can't help you with that but if I get a vote I would say sell or toss the 3mm.

I'll definitely try to sell them and get 1.75mm with the money I got from the 3mm, thanks for the advice!

Oh, awesome! Thanks! And now that I think about it, the threads may have been visible before but I might have not paid attention to the hot end piece until after I tried messing with it. That would make sense though, because it's impossible to screw in without breaking the wires... Thanks!

Hmm, I did not know that! Maybe I should get the 1.75mm then... but I still have the problem of the hot end part sticking out... Anyways, 2 spools of 3mm ABS plastic came with the printer so that is why I'm asking for advice on how to change it and how to screw it back in, because I never unscrewed it.

I can't help you with that but if I get a vote I would say sell or toss the 3mm.

Last night, I tried taking off the cord, but it's very difficult and when I looked at the hot end itself, it seemed like it was popping out; the threads were now visible. I want to fix it, but don't know how, and I definitely don't want to do anything further to it as I'm scared I might break it.

Can anyone please enlighten me on this subject? I would appreciate it greatly! I've included pictures in order to help explain the situation.

Thank you!