For your first picture:

There is a star post behind the metal guide beside the spring you can barely make out...it supports the other side of the gate.

20160229_094918_(resized).jpg

For your second picture:

Looks like you've got the tapered sleeves on the wrong posts.

20160229_094940_(resized).jpg

20160229_095001_(resized).jpg

For your third picture:

Top hole is for the threaded post affixed to the metal guide.

20160229_095047_(resized).jpg

For your last picture:

It's just a yard sale of posts in a tight area. Hopefully you can make sense of the series of photos!

20160229_095141_(resized).jpg

20160229_095203_(resized).jpg

20160229_095232_(resized).jpg

If you need a better shot of the wire gate, I'll need to take the ramp off...but you should be able to get a sense of how it works from the photo on Marco's website. Basically, the under PF coil pulls in when the ball hits its first switch, and the spring lifts the gate up, as it is attached to the gate arm closest to the back of the playfield.