89 pages and no key posts

Just got one of these. Magnet cores are mushroomed, any pro tips on getting them out through the top? Any source for ramp flaps? It doesn't look like pinbits has them.

What's the best way to adjust the monger if the front of the lid sits lower than the back of the lid? If either one is flush the other one affects ball movement pretty badly so I split the difference.

So are the 3 screws on the monger lid any kind of adjustment or are they just an attachment? I can't get the damned thing to sit flush. It's lower in the front no matter what I do (tried bending it) and higher on the left side even with the left side set screw not touching the bracket when it's all the way down.